Perhaps you should try some spelling variations:
kinh sach » sinh sach, dinh sach, tinh sach
tang luan » dung luan
hoc kinh » hoc sinh, luoc kinh
tang cua » mang cua, hang cua, thong cua
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap

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 ((tang cua) or (tang luan)) dung ((cong dan) or (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc kinh sach - hanh ((tang cua) OR (tang luan)) dung ((cong dan) OR (cong tan)) toan cau.
• Adding a wildcard symbol may retrieve word variants: hoc kinh sach - hanh ((tang cua) or (tang luan)) dung ((cong dan) or (cong tan)) toan cau*.