>>When I put this phrase in double quotes, it found this thread. But wondering why it didn't find this thread without double quotes as each individual word was also in this thread?
>>
>>BTW, may be you need to add a tool tip description about double quotes usage for searching the exact phrase?
>
>Mine shows 169, when using the default (OR). When in quotes, which requires the syntax as is, I found 157.

What phrase did you use? I used 'also make this clear' first without double quotes (in UT forum) and it found nothing and then with double quotes and it only found this thread.