Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
dung cong » dung trong
tung cua » trung cua, tuong cua, dung cua
cua dung » cua dang, cua dong, qua dung
cong tan » cong tac, cong san, cong thanh
tran tan » tran tuan, tran van, tran thanh

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: nghe hieu lang - thanh tung cua dung cong tan tran tan~.
• Adding a wildcard symbol may retrieve word variants: nghe hieu lang - thanh tung cua dung cong tan tran tan*.