Perhaps you should try some spelling variations:
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
nganh hung » nhanh hung, nganh khong, ngan hang
cach thoi » cac thoi, cach thuc, cach noi
hoc nganh » hoc nhanh
thoi tap » toi tap, hoc tap, thoi dai
cong hoc » dong hoc, cong hoa, cong coc
hung hoa » hang hoa, ung hoa, trung hoa
nhan dan » phan dau, gian dan, nhan tai
tu cach » tu cac
hoa may » hoc may
hoi van » hoi va, hoi dan, hai van
hai tan » hai van, hai quan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien thu cong hoc nganh hung hoa may ((hoi van) OR (hai tan)) nhan dan~.
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien thu cong hoc nganh hung hoa may ((hoi van) or (hai tan)) nhan dan*.