Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
thanh tung » thanh cong
luong quan » thong quan, duong qua
doi chieu » doc hieu, doi chi, ho chieu
luong va » dung va
toan cau » toan ban, toan tap, toan tai
toan cao » toan ban, toan tap
tung va » trung va, tuong va, dung va

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 va nhung ((luong quan) OR (luong va)) ((toan cau) OR (toan cao))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu sach - thanh tung va nhung ((luong quan) or (luong va)) ((toan cau) OR (toan cao))~".
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh tung va nhung ((luong quan) or (luong va)) ((toan cau) OR (toan cao))*.