Perhaps you should try some spelling variations:
thanh trung » thanh tung
hieu quang » thieu quang, hieu quan, hieu qua
dung cuong » dung cong, dung luong, dang cuong
hieu lang » chieu sang, nhieu tang, hieu van
trung cua » truong cua, trung tuan, trung cap
cuong tap » luong tap, cong tac, luong tai
cua dung » cua dang, cua dong, qua dung
tap doan » tap quan
doan tap » toan tap, doan cap, doanh tai

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 ((chinh sach) OR (((hieu lang) OR (hieu quang)))) - thanh trung cua dung cuong tap doan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chinh sach) or (((hieu lang) OR (hieu quang)))) - thanh trung cua dung cuong tap doan tap~".
• Adding a wildcard symbol may retrieve word variants: ho ((chinh sach) or (((hieu lang) OR (hieu quang)))) - thanh trung cua dung cuong tap doan tap*.