Perhaps you should try some spelling variations:
chiet tach » chieu sach
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cap » truong cao, trung tam
dang cong » dung cong
cong tan » cong tac, cong san, cong thanh
tan ran » tan tran, tan van, tan san
ran cau » van cau, ban cau, can cau

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 cap) or (trong nha)) dang cong tan ran cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((hieu manh) OR (chiet tach)) - thanh ((trung cap) OR (trong nha)) dang cong tan ran cau.
• Adding a wildcard symbol may retrieve word variants: ho ((hieu manh) or (chiet tach)) - thanh ((trung cap) or (trong nha)) dang cong tan ran cau*.