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