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
tang cua » hang cua, tang luan, thong cua
mang cua » manh cua, dung cua, ban cua
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.

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