Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
hoc nganh » hoc nhanh
khong hoc » khung hoc, thong hoc, khong thuoc
chau nhan » chan nhan, chau phan, ca nhan
sach hoc » cach hoc, sach hoi, mach hoc
cau nhan » ca nhan, cu nhan, cam nhan
tu sach » thu sach, su sach, te sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoc mai » hoc ma, hoc dai, hoc bai
mai hoi » mai khoi, dai hoi, lai hoi

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

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