Perhaps you should try some spelling variations:
nganh khong » nhanh chong, nganh nong, nganh khoa
nghien cac » nghiep cach, nghien cuu, nghiep cay
nganh cong » nhanh chong, thanh cong
chan nhan » chan nan, chau nhan, thanh nhan
sach hoc » cach hoc, sach hoi, mach hoc
cac cong » cua cong
cong hoa » dong hoa, dong hoc, hang hoa
hoi chan » hoc chan, hoi cham, hoi han
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 (nganh cong)) hoc xa hoi chan 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 (nganh cong)) hoc xa hoi chan nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cac cong hoa ((nganh khong) or (nganh cong)) hoc xa hoi chan nhan dan*.