Search logics explained

The logic on the same or across the separate fields for each keyword (title, content, excerpt etc..)

OR

Match is found if any of the search keywords is part of the content. It's the least strict of all possible options - it returns many results, finds almost anything.

Keyword	Fields	Match?
hello	Post Title: Hello big world! Post Content: Robot here!	YES
hello wor	Post Title: Hello big world! Post Content: Robot here!	YES
hello robot	Post Title: Hello big world! Post Content: Robot here!	YES
hel bot	Post Title: Hello big world! Post Content: Robot here!	YES
help bot hello	Post Title: Hello big world! Post Content: Robot here!	YES
hello science	Post Title: Hello big world! Post Content: Robot here!	YES

OR with exact word matches

Similar to the simple OR, but at least one keyword must match a whole word. Partial results are not accepted.

Keyword	Fields	Match?
hello	Post Title: Hello big world! Post Content: Robot here!	YES
hello wor	Post Title: Hello big world! Post Content: Robot here!	YES
hello robot	Post Title: Hello big world! Post Content: Robot here!	YES
hel bot	Post Title: Hello big world! Post Content: Robot here!	NO (whole word don't match)
help bot hello	Post Title: Hello big world! Post Content: Robot here!	YES
hello science	Post Title: Hello big world! Post Content: Robot here!	YES

AND

Every keyword must match at least partially the content.

Keyword	Fields	Match?
hello	Post Title: Hello big world! Post Content: Robot here!	YES
hello wor	Post Title: Hello big world! Post Content: Robot here!	YES
hello robot	Post Title: Hello big world! Post Content: Robot here!	YES
hel bot	Post Title: Hello big world! Post Content: Robot here!	YES
help bot hello	Post Title: Hello big world! Post Content: Robot here!	NO
hello science	Post Title: Hello big world! Post Content: Robot here!	NO

AND with exact word matches

The most strict search logic. Every keyword must match a whole word in the content.

Keyword	Fields	Match?
hello	Post Title: Hello big world! Post Content: Robot here!	YES
hello wor	Post Title: Hello big world! Post Content: Robot here!	NO
hello robot	Post Title: Hello big world! Post Content: Robot here!	YES
hel bot	Post Title: Hello big world! Post Content: Robot here!	NO
help bot hello	Post Title: Hello big world! Post Content: Robot here!	NO
hello science	Post Title: Hello big world! Post Content: Robot here!	NO