Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
phan dung » phan ung, phan dang, chan dung
hoi thanh » hoc thanh, hai thanh, hoa thanh
thoi tap » toi tap, hoc tap, thoi dai
huu tuan » huu han, huu tung
cuu hoan » luu hoang, cuu van, cuu khoa
hoc phan » hoc dan, hoc pho
dung hoc » dong hoc, dung thuoc, trung hoc
tu cach » tu cac
san dan » sanh dan, shan dan, ban dan
ma hoi » mai hoi, xa hoi, ma hoa

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach thoi tap, nghien ((huu tuan) or (cuu hoan)) hoc phan dung hoc ma hoi thanh san dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien ((huu tuan) OR (cuu hoan)) hoc phan dung hoc ma hoi thanh san dan.
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien ((huu tuan) or (cuu hoan)) hoc phan dung hoc ma hoi thanh san dan*.