Perhaps you should try some spelling variations:
theo thuoc » tao thuoc, thu thuoc
che thuoc » nha thuoc, cay thuoc, cua thuoc
cua nhung » va nhung
anh tang » anh bang, anh dang, anh nang
tang cua » mang cua, hang cua, tang luan
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
toan ban » van ban

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo thuoc) OR (che thuoc)) sach - anh tang cua nhung ((cong tan) OR (cong san)) toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo thuoc) or (che thuoc)) sach - anh tang cua nhung ((cong tan) OR (cong san)) toan ban~".
• Adding a wildcard symbol may retrieve word variants: ((theo thuoc) or (che thuoc)) sach - anh tang cua nhung ((cong tan) OR (cong san)) toan ban*.