Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
khoi nganh » hoc nganh, moi nganh
tong khoi » xong khoi, tuong khoa, thong khoa
khong hoc » khung hoc, thong hoc, khong thuoc
van thanh » ban thanh, van tuan
sach hoc » cach hoc, sach hoi, mach hoc
thu tong » thu tuong, thu trong, thu cong
te sach » toc sach
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: te sach hoc tap, nghien thu tong khoi nganh khong hoc ma hoi ((ca nhan) or (van thanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien thu tong khoi nganh khong hoc ma hoi ((ca nhan) OR (van thanh)) van.
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien thu tong khoi nganh khong hoc ma hoi ((ca nhan) or (van thanh)) van*.