I have created a custom index that indexes the types and properties I want. This works fine.

Now, I want to use the index to search using wildcard search.

However, I am getting a lot of content that doesn't contain the search query at all. What am I doing wrong?

    var query = index.Searcher.CreateQuery(IndexTypes.Content, BooleanOperation.Or)
        .Field("name", searchQuery.MultipleCharacterWildcard())
        .Or()
        .Field("title", searchQuery.MultipleCharacterWildcard())
        .Or()
        .Field("preamble_sv", searchQuery.MultipleCharacterWildcard())
        .Or()
        .Field("preamble_en", searchQuery.MultipleCharacterWildcard());

If I search for 'alb', I get this content which doesn't contain 'alb' at all.