+ A leading plus sign indicates that this word must be present in each row that is returned.
- A leading minus sign indicates that this word must not be present in any of the rows that are returned.
By default (when neither + nor - is specified) the word is optional.
* The asterisk serves as a final wildcard. e.g. tho* will match both Thomas and Thos.
" A phrase that is enclosed within double quote (") characters matches only rows that contain the phrase literally, as it was typed.
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