Perhaps you should try some spelling variations:
nghien cac » nghiep cach, nghien cuu, nghiep bac
nghiep cay » nghiep chan, nghiep va, nghiep cua
nhanh cong » nhanh chong, thanh cong, nganh cong
hoc nhanh » hoc nganh, hoc phan
cong duoc » cong cuoc, dong duoc, cong duc
sach hoc » cach hoc, sach hoi, mach hoc
dong hoc » dong co, dong luc
duoc mai » duoc ma, duoc dai, duoc hai
nhan dan » phan dau, gian dan, nhan tai
te sach » toc sach
mai hoi » mai khoi, dai hoi, lai hoi
va nhan » van nhan, ca nhan, va phan

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 cac) or (nghiep cay)) dong hoc nhanh cong duoc mai hoi va nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, ((nghien cac) OR (nghiep cay)) dong hoc nhanh cong duoc mai hoi va nhan dan.
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, ((nghien cac) or (nghiep cay)) dong hoc nhanh cong duoc mai hoi va nhan dan*.