Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
truong va » truong cao, truong dao, luong va
dung cong » dung trong
ho chieu » theo chieu, hoc thieu, doi chieu
trung va » trang va, trung ha, trung tam
cong tan » cong tac, cong san, cong thanh
tan toan » tan tran, tap toan, van toan
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu sach - thanh ((trung va) OR (((truong va) OR (truong dai)))) dung cong tan toan cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu sach - thanh ((trung va) or (((truong va) OR (truong dai)))) dung cong tan toan cao~".
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung va) or (((truong va) OR (truong dai)))) dung cong tan toan cao*.