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
thanh lap » thanh san, thanh hai, thanh van
phan lap » phan dau
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 trong) or (cong dong)) van ((thanh lap) or (phan lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh tranh cua ((cong trong) OR (cong dong)) van ((thanh lap) OR (phan lap)).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh tranh cua ((cong trong) or (cong dong)) van ((thanh lap) or (phan lap))*.