Perhaps you should try some spelling variations:
thanh trung » thanh tung
chiet tach » chieu sach
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung tuan, trung cap
cua dung » cua dang, cua dong, qua dung
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: ho ((hieu manh) or (chiet tach)) - thanh trung cua dung ((cong tan) OR (cong san)) tran cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chiet tach)) - thanh trung cua dung ((cong tan) OR (cong san)) tran cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu manh) or (chiet tach)) - thanh trung cua dung ((cong tan) OR (cong san)) tran cao".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chiet tach)) - thanh trung cua dung ((cong tan) OR (cong san)) tran cao*.