contains searches within the whole text without considering separators. haskeywords gets the whole text and searches based on some regex, I can't remember exactly but some characters are considered as separator (e.g. space, comma, pipe, etc.)
Selcuk Dogru
11/13/2019, 4:40 PM
for example text "this is my text to be searched" contains "search" but does not have keyword "search". it has keyword "searched"