Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
hanh hang » thanh hang, hang hang, hanh han
dung cong » dung trong
manh toan » thanh toan, anh tuan, tinh toan
hang cap » hang ca, hang cau, hang cac
cap dung » ap dung, cao dung, chan dung
san toan » van toan, dan toan, xuan toan

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