Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trong nang » trong ngang, trong nong, thong nang
trung van » truong van, trung va, trung tuan
trong van » trong cac
nang hang » nang sang, hang hang, cang thang
ho chieu » theo chieu, hoc thieu, mot chieu
hang cau » hang dau, hang ca, nhung cau

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 - thanh ((trung van) OR (trong van)) dung trong nang hang cau~.
• Adding a wildcard symbol may retrieve word variants: ho chieu sach - thanh ((trung van) or (trong van)) dung trong nang hang cau*.