Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
kinh sach » sinh sach, dinh sach, tinh sach
dan thanh » dang thanh, danh thanh, ban thanh
thanh ban » thanh san, thanh van, thanh bac
hoc kinh » hoc sinh, luoc kinh
trang va » hang va
tran van » luan van
cong dan » cong san, cong tan, huong dan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc kinh sach - hanh ((trang va) or (tran van)) nhung cong dan thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kinh sach - hanh ((trang va) OR (tran van)) nhung cong dan thanh ban.
• Adding a wildcard symbol may retrieve word variants: hoc kinh sach - hanh ((trang va) or (tran van)) nhung cong dan thanh ban*.