Search Option "&"

Hello

I would love to see a new search option. The &. To search for a Word with more than one KEY in which both has to be present. 

Actually with <AND> it searches for words which has either but not mandatory both.

Word@[KEY G…], [KEY G…] also is an <OR>

Word@[KEY G…] & [KEY G…] for words which must have both keys. 

Thanks.