Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nganh khoa » nganh hoa, doanh khoa, anh khoa
nghien cac » nghiep cach, nghien cuu, nghiep cay
chau nhan » chan nhan, chau phan, ca nhan
hoi chau » hoi chu, hoi cham, hai chau
nhan van » nhan dan, nhan va, phan van
cong hoc » dong hoc, cong hoa, cong coc
cac cong » cua cong
sach do » sach dao, sach doi, sach de
tu sach » thu sach, su sach, te sach
hoc xa » hoc ma
do dap » doi dap, do dai, do dac

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 do dap, nghien cac cong hoc ((nganh khoa) or (nganh khong)) hoc xa hoi chau nhan van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach do dap, nghien cac cong hoc ((nganh khoa) OR (nganh khong)) hoc xa hoi chau nhan van.
• Adding a wildcard symbol may retrieve word variants: tu sach do dap, nghien cac cong hoc ((nganh khoa) or (nganh khong)) hoc xa hoi chau nhan van*.