Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
trinh cua » tinh cua, trinh luat, trinh quan
cong bang » cuong bang, dong bang, hong bang
bang than » bang thanh, ban than, sang than
nho hieu » nha hieu, nho sieu, nhu hieu
than cau » toan cau, phan cau, than cap
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)) lang - hanh ((trinh cua) OR (tinh chat)) nhung cong bang than cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho hieu) OR (nho hieu)) lang - hanh ((trinh cua) OR (tinh chat)) nhung cong bang than cau".
• Adding a wildcard symbol may retrieve word variants: ((ho hieu) OR (nho hieu)) lang - hanh ((trinh cua) OR (tinh chat)) nhung cong bang than cau*.