Perhaps you should try some spelling variations:
nganh khong » nganh cong, nganh nong, nganh khoa
nhanh chong » thanh cong, khanh phong
nghien cac » nghiep cach, nghien cuu, nghiep cay
chau nhan » chan nhan, chau phan, ca nhan
sach hoc » cach hoc, sach hoi, mach hoc
cac cong » cua cong
cong hoa » dong hoa, dong hoc, hang hoa
hoi chau » hoi chu, hoi cham, hai chau
nhan dan » phan dau, gian dan, nhan tai
tu sach » thu sach, su sach, te sach
hoc xa » hoc ma

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 cac cong hoa ((nganh khong) or (nhanh chong)) hoc xa hoi chau nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cac cong hoa ((nganh khong) OR (nhanh chong)) hoc xa hoi chau nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cac cong hoa ((nganh khong) or (nhanh chong)) hoc xa hoi chau nhan dan*.