Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
nganh don » nganh cong, nhanh dong, nganh duoc
don thuoc » dong thuoc, dung thuoc, dang thuoc
sach hoi » sach moi, cach thoi, hoach hoi
sach doi » sach moi, sach dao, sach bai
tung hoc » trung hoc, tuong hoc, dung hoc
thuoc va » thuc va, thuoc ma, thuong va
va phap » va phat, ban phap
phap va » phap vat, pham va, pham van
va hoi » xa hoi, va hoc, va hoa

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 hoi) or (sach doi)) tap, nhiem huu tung hoc nganh don thuoc va hoi va phap va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach hoi) OR (sach doi)) tap, nhiem huu tung hoc nganh don thuoc va hoi va phap va.
• Adding a wildcard symbol may retrieve word variants: te ((sach hoi) or (sach doi)) tap, nhiem huu tung hoc nganh don thuoc va hoi va phap va*.