Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
cong trong » cong thuong, duong trong, cong trinh
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cong nong » cong dong, cong luong, trong nong
cong cong » cong dong, trong cong, dung cong
son thanh » ban thanh, van thanh
thanh lap » thanh san, phan lap, thanh hai
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 tranh cua ((((cong nong) OR (cong trong))) or (cong cong)) son thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh tranh cua ((((cong nong) OR (cong trong))) OR (cong cong)) son thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh tranh cua ((((cong nong) OR (cong trong))) or (cong cong)) son thanh lap".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tranh cua ((((cong nong) OR (cong trong))) or (cong cong)) son thanh lap*.