Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep vua, nghe cua
nghiep cua » nghiep vua, nghiep luan, nghien cuu
hoan thanh » hoang thanh, ban thanh, van thanh
cong hoan » cong hoa, dong hoa, cong san
cap dich » cay dich, tap dich, canh dich
dich hoc » sinh hoc, hinh hoc, tinh hoc
cac nhan » ca nhan, cac nha, cam nhan
nhan tai » hang tai, van tai, toan tai
pho hoc » phoi hoc, cho hoc, pho ho
hoi cac » hoc cac, voi cac, hoa cac
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: cap dich hoc tap, ((nghien cua) or (nghiep cua)) cong hoan thanh pho hoc ma hoi cac nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cap dich hoc tap, ((nghien cua) OR (nghiep cua)) cong hoan thanh pho hoc ma hoi cac nhan tai.
• Adding a wildcard symbol may retrieve word variants: cap dich hoc tap, ((nghien cua) or (nghiep cua)) cong hoan thanh pho hoc ma hoi cac nhan tai*.