Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
hieu quang » thieu quang, hieu quan, hieu qua
hanh tang » hanh trang, anh tang, hanh mang
cong nong » cong dong, cong cong, cong trong
tang cua » mang cua, hang cua, tang luan
ban than » ban thanh, van thanh, ban hang
dan chan » dan gian, dan ca, van chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (hieu quang)) - hanh tang cua cong nong ((ban than) or (dan chan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (hieu quang)) - hanh tang cua cong nong ((ban than) OR (dan chan)) cao.
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu quang)) - hanh tang cua cong nong ((ban than) or (dan chan)) cao*.