Perhaps you should try some spelling variations:
theo thuoc » che thuoc, tao thuoc, thu thuoc
thuoc sach » hoc sach, nuoc sach, thuat sach
hanh tranh » canh tranh, hanh trinh, hanh trang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tran cao » toan cao, tran chau, trang cho

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo thuoc sach - hanh tranh cua nhung ((cong tan) or (cong san)) tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo thuoc sach - hanh tranh cua nhung ((cong tan) OR (cong san)) tran cao.
• Adding a wildcard symbol may retrieve word variants: theo thuoc sach - hanh tranh cua nhung ((cong tan) or (cong san)) tran cao*.