Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
cong thanh » dong thanh, cong trinh, cong tan
hieu lang » chieu sang, hieu quang, nhieu tang
tang quan » tang luan, nang quan, tong quan
quan dung » quang dung, quan duong, qua dung
dung cong » dung trong
anh tang » anh bang, anh dang, anh nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) or (hieu lang)) - anh tang quan dung cong thanh ((toan ban) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (hieu lang)) - anh tang quan dung cong thanh ((toan ban) OR (van ban)).
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (hieu lang)) - anh tang quan dung cong thanh ((toan ban) or (van ban))*.