Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, hang cong, nhung don
thong cong » trong cong, tong cong, thong thong
hien sang » hien trang, khien bang, chieu sang
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien sang - hanh trinh luat ((nhung cong) or (thong cong)) dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien sang - hanh trinh luat ((nhung cong) OR (thong cong)) dan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc hien sang - hanh trinh luat ((nhung cong) or (thong cong)) dan than cau*.