Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
lang tan » lang ban, lang man, tang tan
lang van » dang van, tang van, hoang van
cong ha » cong hoa, dong ha, cong tac
ha dung » hai dung, kha dung, nha dung

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 - thanh cong ha dung cong ((lang tan) OR (lang van)) cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh cong ha dung cong ((lang tan) OR (lang van)) cao".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh cong ha dung cong ((lang tan) OR (lang van)) cao*.