Perhaps you should try some spelling variations:
thanh trung » thanh tung
thanh thanh » nhanh thanh, thanh toan, thanh phan
chieu sach » chinh sach, chiet tach, chieu sang
hieu quang » thieu quang, hieu quan, hieu qua
trung tuan » trung thanh, trung tam, tran tuan
thanh than » thanh thang, thanh toan, thanh phan
tuan dung » tuan duong, tran dung, tan dung
dung cong » dung trong

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 ((chieu sach) OR (hieu quang)) - thanh trung tuan dung cong ((thanh than) OR (thanh thanh)) cap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (hieu quang)) - thanh trung tuan dung cong ((thanh than) OR (thanh thanh)) cap~".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (hieu quang)) - thanh trung tuan dung cong ((thanh than) OR (thanh thanh)) cap*.