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
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
cua dang » cua ban
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 manh toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((hieu manh) OR (chieu sach)) - hang mang ((cua dang) OR (cua cong)) cong manh toan cao.
• Adding a wildcard symbol may retrieve word variants: theo ((hieu manh) or (chieu sach)) - hang mang ((cua dang) or (cua cong)) cong manh toan cao*.