Perhaps you should try some spelling variations:
thanh dung » thanh duong, thanh tung, thanh hung
hieu lang » chieu sang, hieu quang, nhieu tang
thong den » thong dien, thong dan, tuong den
cu thong » cuoi thong, sau thong, duy thong
den tran » den tuan, den thanh, dang tran
tran tap » toan tap, tran tan, tran tuan
dung cu » dung cua, dung co, dung cho

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: doi ((hieu lang) OR (chinh sach)) - thanh dung cu thong thong den tran tap~.
• Adding a wildcard symbol may retrieve word variants: doi ((hieu lang) or (chinh sach)) - thanh dung cu thong thong den tran tap*.