don't have Admin CP -> vBulletin Options -> Search Type option in my forum !!!!

[محروم.كوم]

Hi all,

I don't have Admin CP -> vBulletin Options -> Search Type option in my forum !!!!

I have 1,156,090 post in my forum
and I empty the indexes, that make all search result is empty

that forced me to Rebuild Search Index .... that take tooo much time
finished 500,000 in 2 weekes, server got hi load

and after that , I found in my database
postindex = 13,370,364 record (372.4 MiB)
word = 750,283 record

thats very strong and I don't know is that normal or wrong

after search found there is option to change the search type between fulltext and search buildin

can't see that option in my forum,
how to see this option ?
and don't know what is better in my case ?

thanks in advice. __DEFINE_LIKE_SHARE__