Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
manh tran » manh toan, manh tuan, canh tranh
tran tuan » tran xuan, tran quang, tran thanh
tuan tong » toan tong, thuan trong, toan thong
tong cong » trong cong, cong cong, dung cong
cong san » cong tac
toan cau » toan ban, toan tap, toan tai
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 xanh) or (chieu sang)) - manh tran tuan tong cong san ((toan cau) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (chieu sang)) - manh tran tuan tong cong san ((toan cau) OR (toan cao)).
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (chieu sang)) - manh tran tuan tong cong san ((toan cau) or (toan cao))*.