Perhaps you should try some spelling variations:
cach thoi » cac thoi, cach thuc, cach noi
hoc nganh » hoc nhanh
thoi tap » toi tap, hoc tap, thoi dai
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
hang hoc » hang hoa, bang hoc, mang hoc
nang hoc » nang doc, nang luc, hang hoa
tu cach » tu cac
mai hoi » mai khoi, dai hoi, lai hoi
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu cach thoi tap, nghien cuu dong hoc nganh ((hang hoc) or (nang hoc)) mai hoi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu cach thoi tap, nghien cuu dong hoc nganh ((hang hoc) OR (nang hoc)) mai hoi va nhan va.
• Adding a wildcard symbol may retrieve word variants: tu cach thoi tap, nghien cuu dong hoc nganh ((hang hoc) or (nang hoc)) mai hoi va nhan va*.