Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trinh quan » tinh quang, trinh luat, trinh han
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
trinh va » trinh van, trinh vat, trinh ve
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
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 - canh ((trinh va) or (trinh quan)) dung cong van toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - canh ((trinh va) OR (trinh quan)) dung cong van toan cao.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - canh ((trinh va) or (trinh quan)) dung cong van toan cao*.