Perhaps you should try some spelling variations:
thanh trung » thanh tung
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
van hoang » van hoan, quan hoang, tran hoang
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
va hang » van hang, va nang, va lang
chan ta » chan tha, nhan tai, nhan tao

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) or (chieu xanh)) - thanh trung ((va hang) or (van hoang)) cong dan chan ta~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hieu manh) OR (chieu xanh)) - thanh trung ((va hang) OR (van hoang)) cong dan chan ta.
• Adding a wildcard symbol may retrieve word variants: hoc ((hieu manh) or (chieu xanh)) - thanh trung ((va hang) or (van hoang)) cong dan chan ta*.