When searching for "Obama", "Romney" or any other popular word used here on DP - there seems to be a limited number of results.
I promise, the results are not biased.
The issue is how the database counts the word use.
What is happeneing is that we set the search to search for the last 500 instances of a word.
The database finds the last 500 uses then displays them as posts or threads.
Display by Post:
This will show all posts unless you do not have permission to view them or they were deleted.
Display by Thread:
This will show the threads that have the last 500 uses of the word. There might only be 50 threads showed if each thread used the word 10 times.
Rather than showing the last 500 threads that used the word at least once, it shows the threads that consumed the 500 uses.
To help, we have bumped up the results to 1000 from 500.
There is a known issue with pagination (showing 20 pages of results when there are only 3). When clicking on the second page it corrects how many pages of results are left.
VB is aware and working on the issue.
We upgraded our sphinx search engine to 2.0.4 and re-index the search database. Thank you for your patience.