Umbraco use Examine,

You can add a search index to your examine config file,

e.g.

<IndexSet SetName="ProductSearch" IndexPath="~/App_Data/TEMP/ExamineIndexes/ProductSearch/">
    <IndexAttributeFields>
        <add Name="id" />
        <add Name="nodeName" />       
        <add Name="updateDate" />
        <add Name="writerName" />
        <add Name="path" />
        <add Name="nodeTypeAlias" />
        <add Name="parentID" />
    </IndexAttributeFields>
    <IndexUserFields>
        <add Name="bodyText"/>
        <add Name="metaDescription"/>
        <add Name="metaTitle"/>
    </IndexUserFields>
    <IncludeNodeTypes>
        <add Name="TextPage"/>
    </IncludeNodeTypes>
    <ExcludeNodeTypes>
    </ExcludeNodeTypes>
</IndexSet>

What's important there is the IndexAttributeFields, these are property aliases on the document type you want to search on. And IncludeNodeTypes, these are the Document Type aliases (or media type aliases) that you want to show up in the search results. You can also explicitly exclude node types from the search results.

Documentation here

To use the search,

var Searcher = ExamineManager.Instance.SearchProviderCollection["ProductSearch"];

var query = searchCriteria.Field("nodeName","hello").Or().Field("metaTitle","hello").Compile();
var searchResults = Searcher.Search(query);

Then just transform your searchResults in ASPX or CSHTML (web forms or Razor w/e you are using).

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