Perhaps you should try some spelling variations:
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
manh tung » manh hung, thanh tung
va duong » van duong, va tuong, va huong
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
toan cau » toan cao, toan ban, toan tap

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) or (chieu xanh)) - manh tung ((van dong) or (va duong)) cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sang) OR (chieu xanh)) - manh tung ((van dong) OR (va duong)) cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sang) or (chieu xanh)) - manh tung ((van dong) or (va duong)) cong dan toan cau*.