Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
tinh bang » tinh sang, tinh lang, tinh quang
sinh sach » chinh sach, sinh san, sang sach
cua nhung » va nhung
tinh son » tinh toan, dinh so, tinh hoc
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
anh son » anh dong

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc sinh sach - ((((anh son) OR (tinh son))) or (tinh bang)) cua nhung cong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc sinh sach - ((((anh son) OR (tinh son))) OR (tinh bang)) cua nhung cong dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc sinh sach - ((((anh son) OR (tinh son))) or (tinh bang)) cua nhung cong dan than cau".
• Adding a wildcard symbol may retrieve word variants: hoc sinh sach - ((((anh son) OR (tinh son))) or (tinh bang)) cua nhung cong dan than cau*.