I configured Examine Search to search for a specific searchstring in a few fields but it seems like I only get results for searchterms that exists in the nodeName and not for searchterms that exists in one of the UserFields I defined.

Am I missing something?

The ExamineIndex I use:

<IndexSet SetName="WWSIndexSet" IndexPath="~/App_Data/ExamineIndexes/WWS/">
        <IndexAttributeFields>
            <add Name="id" />
            <add Name="nodeName" />
            <add Name="nodeTypeAlias" />
        </IndexAttributeFields>
        <IndexUserFields>
            <add Name="productName_NL"/>
            <add Name="productDescription_NL"/>
            <add Name="productExtraInfo_NL"/>
            <add Name="productSeoKeywords_NL"/>
            <add Name="productSeoDescription_NL"/>
            <add Name="productName_FR"/>
            <add Name="productDescription_FR"/>
            <add Name="productExtraInfo_FR"/>
            <add Name="productSeoKeywords_FR"/>
            <add Name="productSeoDescription_FR"/>
        </IndexUserFields>
        <IncludeNodeTypes>
            <add Name="ProductItemDoctype" />
        </IncludeNodeTypes>
        <ExcludeNodeTypes>
        </ExcludeNodeTypes>
    </IndexSet>

The ExamineSettings I use:

<Examine>
  <ExamineIndexProviders>
    <providers>
      <add name="InternalIndexer" type="UmbracoExamine.LuceneExamineIndexer, UmbracoExamine"
           runAsync="true"
           supportUnpublished="true"
           supportProtected="true"
           interval="10"
           analyzer="Lucene.Net.Analysis.WhitespaceAnalyzer, Lucene.Net"/>
   
      <add name="WWSIndexer" type="UmbracoExamine.LuceneExamineIndexer, UmbracoExamine"
           runAsync="true"
           supportUnpublished="false"
           supportProtected="true"
           interval="10"
           analyzer="Lucene.Net.Analysis.Standard.StandardAnalyzer, Lucene.Net"
           indexSet="WWSIndexSet" />
    </providers>
  </ExamineIndexProviders>
  <ExamineSearchProviders defaultProvider="InternalSearcher">
    <providers>
      <add name="InternalSearcher" type="UmbracoExamine.LuceneExamineSearcher, UmbracoExamine"
           analyzer="Lucene.Net.Analysis.WhitespaceAnalyzer, Lucene.Net"/>
      <add name="WWSSearcher" type="UmbracoExamine.LuceneExamineSearcher, UmbracoExamine"
           analyzer="Lucene.Net.Analysis.Standard.StandardAnalyzer, Lucene.Net"
           indexSet="WWSIndexSet" />
    </providers>
  </ExamineSearchProviders>
</Examine>

and my search:

ISearchCriteria criteria = ExamineManager.Instance.SearchProviderCollection["WWSSearcher"].CreateSearchCriteria();
ISearchCriteria filter = criteria
                .Field("nodeName", SearchTerm.MultipleCharacterWildcard())
                .Or()
                .Field("productName_NL", SearchTerm.MultipleCharacterWildcard())
                .Or()
                .Field("productName_FR", SearchTerm.MultipleCharacterWildcard())
                .Or()
                .Field("productDescription_NL", SearchTerm.MultipleCharacterWildcard())
                .Or()
                .Field("productDescription_FR", SearchTerm.MultipleCharacterWildcard())
                .Or()
                .Field("productExtraInfo_NL", SearchTerm.MultipleCharacterWildcard())
                .Or()
                .Field("productExtraInfo_FR", SearchTerm.MultipleCharacterWildcard())
                .Or()
                .Field("productSeoKeywords_NL", SearchTerm.MultipleCharacterWildcard())
                .Or()
                .Field("productSeoKeywords_FR", SearchTerm.MultipleCharacterWildcard())
                .Or()
                .Field("productSeoDescription_NL", SearchTerm.MultipleCharacterWildcard())
                .Or()
                .Field("productSeoDescription_FR", SearchTerm.MultipleCharacterWildcard())
                .Compile();
SearchResults = ExamineManager.Instance.SearchProviderCollection["WWSSearcher"].Search(criteria).Distinct();