Perhaps you should try some spelling variations:
nghien huu » nghien cuu, nguyen huu, nhiem huu
doanh hoan » doanh doanh, doanh khoa, doanh nhan
cach thoi » cac thoi, cach thuc, cach noi
toan hoat » toan khoa, toan hoc, toan ho
thoi tap » toi tap, hoc tap, thoi dai
toan hoa » toan khoa, toan hoc, toan ho
hoan hoc » hoa hoc, toan hoc, hoang hoa
van quan » van ban
su cach » su sach, tu cach, su cac
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: su cach thoi tap, nghien huu ((toan hoa) or (toan hoat)) doanh hoan hoc xa hoi va van quan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach thoi tap, nghien huu ((toan hoa) OR (toan hoat)) doanh hoan hoc xa hoi va van quan.
• Adding a wildcard symbol may retrieve word variants: su cach thoi tap, nghien huu ((toan hoa) or (toan hoat)) doanh hoan hoc xa hoi va van quan*.