Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
tang luong » nang luong, tang cuong, hang luong
luong cong » dung cong, trong cong, cong cong
hanh tang » hanh trang, anh tang, hanh mang
duong dan » duong dang, huong dan, duong van
dong dan » dong danh, dong san, cong dan
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 sach) OR (chieu sang)) - hanh tang luong cong ((dong dan) or (duong dan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chieu sang)) - hanh tang luong cong ((dong dan) OR (duong dan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chieu sang)) - hanh tang luong cong ((dong dan) or (duong dan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chieu sang)) - hanh tang luong cong ((dong dan) or (duong dan)) toan cau*.