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 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.

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu sach - thanh tung va nhung ((luong quan) or (luong va)) toan cau~.
• 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.
• Adding a wildcard symbol may retrieve word variants: doi chieu sach - thanh tung va nhung ((luong quan) or (luong va)) toan cau*.