Perhaps you should try some spelling variations:
chieu sach » chiet tach, chieu sang, chieu xanh
hang cong » dang cong, hang nong, bang cong
dinh van » sinh vat
cong dan » cong san, cong tan, huong dan
dan phan » doan phan, dan chan, van phan
phan cau » phan dau, phan cac, phan tu
sinh va » sinh vat, tinh va

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 (chinh sach)) - canh ((sinh va) OR (dinh van)) hang cong dan phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chinh sach)) - canh ((sinh va) OR (dinh van)) hang cong dan phan cau~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chinh sach)) - canh ((sinh va) OR (dinh van)) hang cong dan phan cau*.