Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
hanh thanh » nhanh thanh, thanh thanh, khanh thanh
thanh toan » thanh hoa, thanh san, tinh toan
thanh hai » thanh phan, thanh hoa, thanh san
tong cong » trong cong, cong cong, dung cong
hai tong » hai trong, thai tong, han tong

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu xanh) OR (chieu sang)) - hanh thanh hai tong cong ((xuan toan) or (thanh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu xanh) OR (chieu sang)) - hanh thanh hai tong cong ((xuan toan) OR (thanh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu xanh) OR (chieu sang)) - hanh thanh hai tong cong ((xuan toan) or (thanh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu xanh) OR (chieu sang)) - hanh thanh hai tong cong ((xuan toan) or (thanh toan)) cao*.