OmniHelp supports single-term and Boolean (AND, OR, NOT) full-text search. A search on a phrase is implemented by successively ANDing the search terms: topics found include all terms in the phrase, except for stop words (see §9.10.3 ), whether or not those terms occur together. Search does not find terms that start with non-alphanumeric characters. For example, to find $$_currbase, you would have to search for currbase; and to find -progid, you would search for progid. Search does not find partial terms; for example, a search for curr finds <$Curr>, but not $$_currbase.
> 9 Generating OmniHelp > 9.10 Configuring full-text search for OmniHelp