Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hanh hang » thanh hang, hang hang, hanh mang
chua nang » chuc nang, kha nang, cuu nang
chua xang » chuc nang, chu bang, chua dong
sang than » cang thang, dang thanh, sang tao
than toan » thanh toan, than tuan, thuat toan
ho chieu » theo chieu, hoc thieu, doi chieu
hanh han » hanh nhan, hanh phan, hanh san
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: ho chieu sach - ((hanh hang) OR (hanh han)) ((chua nang) or (chua xang)) sang than toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - ((hanh hang) OR (hanh han)) ((chua nang) OR (chua xang)) sang than toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - ((hanh hang) OR (hanh han)) ((chua nang) or (chua xang)) sang than toan cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - ((hanh hang) OR (hanh han)) ((chua nang) or (chua xang)) sang than toan cao*.