Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
trinh vat » trinh luat, sinh vat, trinh tai
trinh van » trinh quan, trinh toan, dinh van
trinh han » trinh quan
dung cong » dung trong
cong san » cong tac
san chan » san chang, dan chan, san chay
chan nan » chan nhan, chang nang, chan doan

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 vat) or (((trinh van) OR (trinh han)))) dung cong san chan nan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sach - hanh ((trinh vat) OR (((trinh van) OR (trinh han)))) dung cong san chan nan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - hanh ((trinh vat) or (((trinh van) OR (trinh han)))) dung cong san chan nan".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - hanh ((trinh vat) or (((trinh van) OR (trinh han)))) dung cong san chan nan*.