Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
thuong han » thuong mai, thuong va, thuong gap
tra thanh » tran thanh, ta thanh, thai thanh
hieu lang » chieu sang, hieu quang, nhieu tang
hanh tra » thanh tra, khanh tra, hanh tram
han van » phan van, nhan van, hanh van
ban can » ban dan, ban hang, ban hanh

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 (hieu qua)) - hanh tra thanh thuong han van ban can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nho ((hieu lang) OR (hieu qua)) - hanh tra thanh thuong han van ban can*.