The default search engine since v1.6 is kind of crap. The attached file is a port of the (much better) v1.5 search engine. Place in ROOT/override/classes en rebuild the search indexes and you should be fine. Works for sure till V1.7.2 but I see no reason why it should not work on higher versions too. If it does not fit, remove the file again and you go back to the default.
Rg,
Leo
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