Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
hang cong » dang cong, hang nong, bang cong
tong cong » trong cong, cong cong, dung cong
tinh cua » trinh cua, sinh cua, tinh chat
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
ho hieu » ho chieu, hoi hieu, nho 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 lang - hanh tinh cua ((((nhung cong) or (hang cong))) or (tong cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh tinh cua ((((nhung cong) OR (hang cong))) OR (tong cong)) dan than cau.
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tinh cua ((((nhung cong) or (hang cong))) or (tong cong)) dan than cau*.