Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
thuoc nganh » thuong nganh, hoc nganh, chuc nganh
long thuoc » luong thuoc, dong thuoc, khong thuoc
thuong va » truong va, thong va, thuong mai
sach hoc » cach hoc, sach hoi, mach hoc
cuu long » cuu cong, cuu tong, cuu nang
thuc dan » thuc hanh, hoc dan, thuc vat
phap vat » phap luat, phap phat, phap viet
so sach » so sanh, bo sach, co sach
hoi ban » hoi dan, hoi bai, doi ban

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 long thuoc nganh khong ((thuong va) or (thuc dan)) hoi ban phap vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien cuu long thuoc nganh khong ((thuong va) OR (thuc dan)) hoi ban phap vat.
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien cuu long thuoc nganh khong ((thuong va) or (thuc dan)) hoi ban phap vat*.