Perhaps you should try some spelling variations:
doi chieu » doc hieu, doi chi, mot chieu
dung lang » dung dang, dung nang, dung land
lang phan » nang phan, lang thang, lang phong
dan dung » van dung, tin dung, ap dung
phan lap » phan dau
cong so » cong san, cong hoa
so dan » co dan, so dac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doi chieu) or (toc thieu)) sach - thanh cong so dan dung lang phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doi chieu) OR (toc thieu)) sach - thanh cong so dan dung lang phan lap.
• Adding a wildcard symbol may retrieve word variants: ((doi chieu) or (toc thieu)) sach - thanh cong so dan dung lang phan lap*.