Perhaps you should try some spelling variations:
theo thuoc » tao thuoc, thu thuoc
nhung cong » dung cong, thong cong, hang cong
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 san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

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

• 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 toan cao~".
• Adding a wildcard symbol may retrieve word variants: ((theo thuoc) OR (che thuoc)) sach - anh tang cua nhung cong tan toan cao*.