Perhaps you should try some spelling variations:
hieu tieng » viet tieng, dien tieng, tiep tieng
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
tranh cua » doanh cua, manh cua
cua nhung » va nhung
dan chan » dan gian, dan ca
van chat » cao chat

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

• Performing a fuzzy search may retrieve terms with similar spellings: nha ((hieu lang) or (hieu tieng)) - canh tranh cua nhung cong ((dan chan) or (van chat)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nha ((hieu lang) OR (hieu tieng)) - canh tranh cua nhung cong ((dan chan) OR (van chat)) cao.
• Adding a wildcard symbol may retrieve word variants: nha ((hieu lang) or (hieu tieng)) - canh tranh cua nhung cong ((dan chan) or (van chat)) cao*.