Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu quang » thieu quang, hieu quan, hieu qua
nhanh lang » nhanh quang, nhanh thang, nhan dang
dang cong » dung cong
lang cua » mang cua, hang cua, long cua
cua dang » cua cong, cua ban
cong ban » cong bang, cong san, cong tan
hang dau » hang tai

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 quang)) - nhanh lang cua dang cong ban ((hang dau) or (hang va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (hieu quang)) - nhanh lang cua dang cong ban ((hang dau) OR (hang va)).
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) or (hieu quang)) - nhanh lang cua dang cong ban ((hang dau) or (hang va))*.