Searching for multiple words in a cell

Do you mean you don't want it to pick up Power when the sentence contains Powers?

If so, try:

=SUBSTITUTE(SUBSTITUTE(TRIM(ACONCAT(IF(ISNUMBER(FIND(" "&KeyWords&" "," "&SUBSTITUTE(SUBSTITUTE(B2,".",""),",","")&" ")),SUBSTITUTE(KeyWords," ","^^"),"")," "))," ",", "),"^^"," ")

CSE confirmed

But note, that if you have words that have a symbol next to them like for example in this sentence: I am the best (President) of all time. Then it would not pick up President because it has a bracket before and/or after... I have used SUBSTITUTE functions to replace periods and commas, you can add more for the brackets, but there could be other symbols, like semi colons or colons, or exclamation points, or question marks, etc....