Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong thuoc » khang thuoc, hong phuoc, dong thuoc
hoc nganh » hoc nhanh
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
thuoc xa » thuoc ma, thuoc va, thuoc la
nhan van » nhan dan, nhan va, phan van
so sach » so sanh, bo sach, co sach
hai van » thai van, ha van, hao van
hai tan » hai quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach hoc tap, nghien cuu dong hoc nganh khong thuoc xa ((hai van) OR (hai tan)) nhan van~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach hoc tap, nghien cuu dong hoc nganh khong thuoc xa ((hai van) OR (hai tan)) nhan van".
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien cuu dong hoc nganh khong thuoc xa ((hai van) OR (hai tan)) nhan van*.