Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » thong cong, hang cong, nhung don
trinh cua » tinh cua, trinh luat, trinh quan
dung cong » dung trong
nco hieu » nho hieu, ngoc hieu, cao hieu
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
co hieu » cao hieu, doc hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((co hieu) or (nco hieu)) lang - hanh trinh cua ((nhung cong) OR (dung cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co hieu) OR (nco hieu)) lang - hanh trinh cua ((nhung cong) OR (dung cong)) dan than cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co hieu) or (nco hieu)) lang - hanh trinh cua ((nhung cong) OR (dung cong)) dan than cau".
• Adding a wildcard symbol may retrieve word variants: ((co hieu) or (nco hieu)) lang - hanh trinh cua ((nhung cong) OR (dung cong)) dan than cau*.