Open Google, type the words you want ... if you want two words or more to appear together put them between quotes ""
then type immediately
site:www.mangago.zone
(if you don't type the word "site" before the url, it won't work).
example:
"short seme" site:www.mangago.zone
The result is that you'll ONLY see results coming for mangago in Google, including questions (if any) of course.
I use this "trick" all the time but it also depends on what you're searching and how you refine your search.
i`d recommend using tags
http://www.mangago.zone/tag/
just put the word you are searching for after the tag, if you are looking for two words or more, make a + inbetween
example
http://www.mangago.zone/tag/Childhood+Friends/
Is there an option to search certain question using some keywords? (using ctr+f to search is tiring )
There are many questions asking the same/similar things that ive seen.