Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
luan thong » luan phong, luan tuong, luat thong
thong cong » trong cong, tong cong, thong thong
thanh toan » thanh hoa, thanh san, tinh toan
manh toan » anh tuan, tinh toan
tac dung » sach dung, xay dung, tin dung

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 sach) or (chieu sang)) - tac dung luan thong cong ((manh toan) OR (thanh toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - tac dung luan thong cong ((manh toan) OR (thanh toan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chieu sang)) - tac dung luan thong cong ((manh toan) OR (thanh toan)) cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chieu sang)) - tac dung luan thong cong ((manh toan) OR (thanh toan)) cau*.