Perhaps you should try some spelling variations:
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tinh cua » trinh cua, sinh cua, tinh chat
quan dau » quan cau, qua dau, quan dac
ho hieu » ho chieu, hoi hieu, nho hieu
quan ha » quan he

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 lang - hanh tinh cua ((nhung cong) or (thong cong)) trinh ((quan dau) or (quan ha))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh tinh cua ((nhung cong) OR (thong cong)) trinh ((quan dau) OR (quan ha)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tinh cua ((nhung cong) or (thong cong)) trinh ((quan dau) or (quan ha))*.