Perhaps you should try some spelling variations:
thanh tuong » thanh thuong, thanh tung, thanh huong
chieu sang » chieu sach, hieu lang, nhieu tang
chieu xanh » chieu sach, chieu tinh, hieu manh
va phuong » va thuong, cac phuong
va thong » va thuong, he thong, va cong
cong tan » cong tac, cong san, cong thanh
tan khan » tan khang, tan nhan, toan khoan
khan cap » khan ap, than cap, khoan cam

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 sang) or (chieu xanh)) - thanh tuong ((va thong) OR (va phuong)) cong tan khan cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sang) OR (chieu xanh)) - thanh tuong ((va thong) OR (va phuong)) cong tan khan cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sang) or (chieu xanh)) - thanh tuong ((va thong) OR (va phuong)) cong tan khan cap".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sang) or (chieu xanh)) - thanh tuong ((va thong) OR (va phuong)) cong tan khan cap*.