Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
trinh van » trinh han, trinh quan, trinh toan
nang cong » nang song, dang cong, bang cong
trinh va » trinh vat, trinh ve, trinh vi
cong san » cong tac
san quan » van quan, ban quan, dan quan
quan thu » tuan thu, quan khu, xuan thu

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 - hanh ((trinh va) or (trinh van)) nang cong san quan thu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((trinh va) OR (trinh van)) nang cong san quan thu.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trinh va) or (trinh van)) nang cong san quan thu*.