Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
khi nganh » khoi nganh, moi nganh, thi ngan
khong hoc » khung hoc, thong hoc, khong thuoc
ban thanh » ban hanh, ban hang
sach hoc » cach hoc, sach hoi, mach hoc
cong khi » cong thai, khong khi, co khi
te sach » toc 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: te sach hoc tap, nghien thu cong khi nganh khong hoc xa hoi ((ca nhan) or (ban thanh)) van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach hoc tap, nghien thu cong khi nganh khong hoc xa hoi ((ca nhan) OR (ban thanh)) van.
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien thu cong khi nganh khong hoc xa hoi ((ca nhan) or (ban thanh)) van*.