Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
thanh phan » thanh pho, thanh san, thanh toan
thanh hoa » thanh pho
bai thanh » ban thanh, tai thanh, mai thanh
cach hoi » cach thoi, cach noi, cach hoc
su cach » su sach, tu cach, su cac
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc bai » hoc dai, hoc giai
bai hoi » bai choi, bai hoc, dai hoi
hoi bai » hoi tai, khoi bay

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 hoi dap, nghien cuu mon hoc ((nganh khong) or (thanh hoa)) hoc bai hoi bai thanh phan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su cach hoi dap, nghien cuu mon hoc ((nganh khong) OR (thanh hoa)) hoc bai hoi bai thanh phan.
• Adding a wildcard symbol may retrieve word variants: su cach hoi dap, nghien cuu mon hoc ((nganh khong) or (thanh hoa)) hoc bai hoi bai thanh phan*.