Perhaps you should try some spelling variations:
thanh thong » thanh thuong, thanh hong, thanh thang
cong thanh » dong thanh, cong trinh, cong tan
tran thanh » ban thanh, van thanh, quan thanh
thieu qua » thieu cua, thieu quang, thien quan
dung cong » dung trong
tran tuan » tran xuan, tran quang, tranh luan
tin » tinh

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 qua) OR (thieu qua)) - thanh thong tin dung cong thanh ((tran tuan) OR (tran thanh))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((hieu qua) or (thieu qua)) - thanh thong tin dung cong thanh ((tran tuan) OR (tran thanh))~".
• Adding a wildcard symbol may retrieve word variants: ho ((hieu qua) or (thieu qua)) - thanh thong tin dung cong thanh ((tran tuan) OR (tran thanh))*.