Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
manh trung » manh tung, thanh trung, manh hung
hoc chieu » hoc thieu, ho chieu, hoc hien
trung va » truong va, trang va, trung ha
cong tac » cong ty
phan dau » phan tu, hang dau
va nang » van nang, da nang, cam nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chieu sang - manh trung va nang ((cong san) or (cong tac)) phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chieu sang - manh trung va nang ((cong san) OR (cong tac)) phan dau.
• Adding a wildcard symbol may retrieve word variants: hoc chieu sang - manh trung va nang ((cong san) or (cong tac)) phan dau*.