Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh tang » hanh trang, anh tang, hanh mang
cua dang » cua cong, cua ban
cua dong » chua dong, cua cong, cua nong
cong tac » cong ty
tac toan » tap toan, tam toan, hach 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: theo ((chieu xanh) or (chieu sang)) - hanh tang ((cua dang) or (cua dong)) cong tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - hanh tang ((cua dang) OR (cua dong)) cong tac toan cau.
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) or (chieu sang)) - hanh tang ((cua dang) or (cua dong)) cong tac toan cau*.