Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
doi chieu » doc hieu, doi chi, ho chieu
tuong cua » truong cua, huong cua, thong cua
dong cong » duong cong, dung cong, dang cong
tung cua » trung cua, dung cua, tang cua
cong tan » cong tac, cong san, cong thanh
toan ban » van ban

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 ((tung cua) OR (tuong cua)) dong cong tan ((toan tap) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh ((tung cua) OR (tuong cua)) dong cong tan ((toan tap) or (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh ((tung cua) OR (tuong cua)) dong cong tan ((toan tap) or (toan ban))*.