1. If you do a search for “test” on the site, the results won’t show up when there are 3 post that has the word “test” in the title.
2. If you do a search for “mangas” no results shows up, but if you put “man” or “mang” it will show a result. However, if you do a search for “manga” (without the S) a deleted post shows up.
The issue was the caching. Since it was enabled and set to 1 day it retrieved results from the search cache, which not yet contained the test posts. You can empty the cache and re-enable it if you want, but I highly suggest not using it unless you have more then 10000 visitors a day.
Thank you for the proper information, it helped me a lot!
Ahh, thanks for the speedy response! my total traffic is a lot more than 10,000 visitors so cache is probably needed. I used wp total cache too. Will wp total cache clash with Ajax Search?