Perhaps you should try some spelling variations:
thanh tinh » thanh binh, nhanh tinh, than kinh
cua nhung » va nhung
nho hieu » nha hieu, nho sieu, nhu hieu
tinh cua » trinh cua, sinh cua, tinh chat
cong dan » cong san, cong tan, cong dong
toan cao » toan ban, toan tap
ho hieu » ho chieu, hoi hieu, co hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho hieu) OR (nho hieu)) qua - thanh tinh cua nhung ((cong dan) or (huong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho hieu) OR (nho hieu)) qua - thanh tinh cua nhung ((cong dan) OR (huong dan)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho hieu) OR (nho hieu)) qua - thanh tinh cua nhung ((cong dan) or (huong dan)) toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) OR (nho hieu)) qua - thanh tinh cua nhung ((cong dan) or (huong dan)) toan cao*.