Perhaps you should try some spelling variations:
cang thang » cong thanh, dang thanh
nhung cong » dung cong, thong cong, hang cong
cho chinh » chon chinh, che chinh, cuoc chinh
ho chinh » hoc chinh, hoa chinh, do chinh
thang va » hang va, trang va, thong va
cong dan » cong san, cong tan, huong dan
than cao » toan cao, than cap, than sao
thai cao » tai cao, thoai cac, thuat cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chinh) OR (cho chinh)) sach - cang thang va nhung cong dan ((than cao) or (thai cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chinh) OR (cho chinh)) sach - cang thang va nhung cong dan ((than cao) OR (thai cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chinh) OR (cho chinh)) sach - cang thang va nhung cong dan ((than cao) or (thai cao))".
• Adding a wildcard symbol may retrieve word variants: ((ho chinh) OR (cho chinh)) sach - cang thang va nhung cong dan ((than cao) or (thai cao))*.