Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
chieu sach » chinh sach, chiet tach, chieu sang
nang hang » nang sang, hang hang, cang thang
cua nhung » va nhung
ho chieu » theo chieu, hoc thieu, doi chieu
hang cua » mang cua, hang ca, huong cua
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat

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: ho chieu sach - nang hang cua nhung cong ((dan than) OR (dan chan)) cao~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - nang hang cua nhung cong ((dan than) or (dan chan)) cao*.