Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
tuong cong » truong cong, trong cong, tong cong
trinh toan » thanh toan, trinh han, trinh quan
doi chieu » doc hieu, doi chi, ho chieu
trung ba » truong ba, trung ha, trung bo
trung va » truong va, trang va, trung ha

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: doi chieu sach - thanh ((trung ba) OR (trung va)) tuong cong ((trinh toan) OR (tinh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((trung ba) or (trung va)) tuong cong ((trinh toan) OR (tinh toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((trung ba) or (trung va)) tuong cong ((trinh toan) OR (tinh toan)) cau*.