Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hanh tang » hanh trang, anh tang, hanh mang
tang luan » dung luan
san cong » sang cong, van cong, man cong
ban cong » bang cong, van cong, phan cong
tac toan » tap toan, tam toan, hach toan
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 (chiet tach)) - hanh tang luan ((san cong) OR (ban cong)) tac toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - hanh tang luan ((san cong) OR (ban cong)) tac toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) or (chiet tach)) - hanh tang luan ((san cong) OR (ban cong)) tac toan cau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (chiet tach)) - hanh tang luan ((san cong) OR (ban cong)) tac toan cau*.