Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
chieu tinh » trieu tinh, lieu tinh, chau tinh
hang nang » chang nang, hang nong, hang hang
thanh tap » thanh tai, thanh tay, thanh tam
thanh lap » thanh san, phan lap, thanh hai
cao cong » cac cong, cao dang, cua cong
dong von » dung von, dong co, dong hoc

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) OR (chieu tinh)) - hang nang cao cong dong von ((thanh tap) OR (thanh lap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu tinh)) - hang nang cao cong dong von ((thanh tap) OR (thanh lap))~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu tinh)) - hang nang cao cong dong von ((thanh tap) OR (thanh lap))*.