Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
dung cong » dung trong
van hanh » van thanh, ban hanh, van anh
hanh lua » hanh luat, hanh sua, hanh cua
lua dung » qua dung, luan hung, qua duong
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan lap » phan dau

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) OR (chieu tinh)) - van hanh lua dung cong tan phan lap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) OR (chieu tinh)) - van hanh lua dung cong tan phan lap".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) OR (chieu tinh)) - van hanh lua dung cong tan phan lap*.