Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu manh » chieu xanh, hieu nganh, dieu hanh
hang mang » hang hang, hang mong, hanh mang
cua dang » cua ban
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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 ((hieu manh) OR (chieu sach)) - hang mang ((cua dang) OR (cua cong)) cong dan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((hieu manh) OR (chieu sach)) - hang mang ((cua dang) OR (cua cong)) cong dan toan cao".
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) OR (chieu sach)) - hang mang ((cua dang) OR (cua cong)) cong dan toan cao*.