Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
thong cong » tong cong, thong thong, phong chong
hieu lang » chieu sang, hieu quang, nhieu tang
hanh mang » nhanh mang, nhanh lang, thanh hang
dan than » dan chan, ban than, van than
than man » than ma, thanh san, tran manh
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 mang) or (hanh trang)) va ((thong cong) OR (trong cong)) dan than man~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((hanh mang) OR (hanh trang)) va ((thong cong) OR (trong cong)) dan than man.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((hanh mang) or (hanh trang)) va ((thong cong) OR (trong cong)) dan than man".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((hanh mang) or (hanh trang)) va ((thong cong) OR (trong cong)) dan than man*.