Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
tranh van » tran van, trinh van, thanh van
dung cong » dung trong
bang cong » dang cong, bang song, cong cong
hang cong » dang cong, hang nong, thanh cong
doan phan » doanh phan, toan phan, dan phan
phan cac » nhan cach, phan dau, phan lap
ho hieu » ho chieu, hoi hieu, nho hieu

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: ho hieu lang - canh tranh van ((dung cong) OR (((bang cong) OR (hang cong)))) doan phan cac~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - canh tranh van ((dung cong) or (((bang cong) OR (hang cong)))) doan phan cac~".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - canh tranh van ((dung cong) or (((bang cong) OR (hang cong)))) doan phan cac*.