Perhaps you should try some spelling variations:
dong thuoc » dung thuoc, dang thuoc, don thuoc
nganh dong » nganh cong, nhanh dong, nganh nong
cach thoi » cac thoi, cach thuc, cach noi
hoc nganh » hoc nhanh
sach doi » sach hoi, sach moi, sach dao
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 ((cach thoi) or (sach doi)) tap, nhiem huu tung hoc nganh dong thuoc va hoi va phap va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((cach thoi) OR (sach doi)) tap, nhiem huu tung hoc nganh dong thuoc va hoi va phap va.
• Adding a wildcard symbol may retrieve word variants: te ((cach thoi) or (sach doi)) tap, nhiem huu tung hoc nganh dong thuoc va hoi va phap va*.