Search results are not as expected when using different search operators (4331450)

When using the AND operator with the OR operator on the Archive Manager search page the returned results are not always what is expected. It appears that the search will find messages meeting the search criteria before the OR operator or after the OR operator but not both.

Example: When searching for "word1 AND word2" OR "word3 AND word4" the expected result would be all messages that contain both words 1 & 2 along with messages that contact both words 3 & 4 would be displayed. However, the results only show the results for messages that contain words 1 & 2 and ignores whats after the OR operator.