This thread needs correction. What @grb said about basic search is false.
Using word1 word2 in the search bar of the bitwarden extension will not perform an AND search but an OR search. I.e. it will search for results which contain either word1 or word2.
Secondly, when using Full Text Search, only the first term is automatically using wildcards around it, so to get the desired behavior here, it would actually need to be:
`>+insta +clientname
to search for results containing “insta” AND “clientname”.