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 phan » cau phan, chau nhan, chau phong
sach hoc » cach hoc, sach hoi, mach hoc
cac cong » cua cong
cong hoa » dong hoa, dong hoc, hang hoa
hai chau » lai chau, ha chau, hat chau
phan dan » phan dang, phan dau, nhan dan
te sach » toc sach
hoc xa » hoc ma
xa hai » xa thai, xua hai, xa hoi

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