Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
lang trong » dung trong, cong trong
dong trong » duong trong, dung trong, cong trong
doi chieu » doc hieu, doi chi, ho chieu
cuu nang » chuc nang, cam nang, cuu van
van tan » van tuan, van ban, van thanh
van tai » von tai, van tuan

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 sach - ((lang trong) or (dong trong)) cuu nang song ((van tan) OR (van tai)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - ((lang trong) OR (dong trong)) cuu nang song ((van tan) OR (van tai)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - ((lang trong) or (dong trong)) cuu nang song ((van tan) OR (van tai)) cau".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - ((lang trong) or (dong trong)) cuu nang song ((van tan) OR (van tai)) cau*.