Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh dung » thanh dung, anh dung, hanh dong
dung cong » dung trong
cho dung » cho dong, cho ung, cao dung
dan toan » van toan, dan than, manh toan
van tan » van tuan, van ban, van tai

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 dung cho dung cong ((dan toan) or (van tan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu xanh) OR (chieu sang)) - hanh dung cho dung cong ((dan toan) OR (van tan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu xanh) OR (chieu sang)) - hanh dung cho dung cong ((dan toan) or (van tan)) tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu xanh) OR (chieu sang)) - hanh dung cho dung cong ((dan toan) or (van tan)) tap*.