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
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
gian dan » gian lang
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoi tai, hai tap
hoc bai » hoc dai, hoc giai
bai hoi » bai choi, bai hoc, dai hoi
va gian » va gianh, van gian, va giai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((hoi tap) OR (hoc tap)), nghien cuu cong hoc nganh khong hoc bai hoi va gian dan~.
• Adding a wildcard symbol may retrieve word variants: tu sach ((hoi tap) or (hoc tap)), nghien cuu cong hoc nganh khong hoc bai hoi va gian dan*.