Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung tuan, trung cap
tong cong » cong cong, dung cong, dang cong
hoc hieu » hoc thieu, hoc hien, doc hieu
van than » van thanh, van thang, van tuan
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - thanh trung cua ((tong cong) or (trong cong)) van than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu manh - thanh trung cua ((tong cong) OR (trong cong)) van than cau.
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh trung cua ((tong cong) or (trong cong)) van than cau*.