Perhaps you should try some spelling variations:
quan thanh » ban thanh, van thanh
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
tinh quan » tinh quang, trinh quan, tin quan
van thang » van thanh, van khang, van hang
ban hang » ngan hang

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

• Performing a fuzzy search may retrieve terms with similar spellings: nho ((hieu lang) OR (nhieu tang)) - hanh tinh quan thanh cong ((van thang) or (ban hang)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu lang) OR (nhieu tang)) - hanh tinh quan thanh cong ((van thang) OR (ban hang)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nho ((hieu lang) OR (nhieu tang)) - hanh tinh quan thanh cong ((van thang) or (ban hang)) ban".
• Adding a wildcard symbol may retrieve word variants: nho ((hieu lang) OR (nhieu tang)) - hanh tinh quan thanh cong ((van thang) or (ban hang)) ban*.