Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
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
ho chieu » theo chieu, hoc thieu, mot chieu
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) OR (doi chieu)) sach - 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) OR (doi chieu)) sach - 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) OR (doi chieu)) sach - hanh hang ((chua nang) or (chua dong)) sang than toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho chieu) OR (doi chieu)) sach - hanh hang ((chua nang) or (chua dong)) sang than toan cao*.