Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
nhiet nang » nhiet dong, viet nang, nhieu tang
luat nhung » luat chung, luat thuong, thuat nhung
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
san thanh » van thanh, son thanh, dan thanh
ban thanh » ban hanh, ban hang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu lang) OR (nhiet nang)) - hanh trinh luat nhung cong ((san thanh) OR (ban thanh)) pham~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu lang) or (nhiet nang)) - hanh trinh luat nhung cong ((san thanh) OR (ban thanh)) pham~".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu lang) or (nhiet nang)) - hanh trinh luat nhung cong ((san thanh) OR (ban thanh)) pham*.