Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
tranh cua » doanh cua, manh cua
dung cong » dung trong
san phan » san pham, van phan, sat phan
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sang) or (hieu lang)) - canh tranh cua ((nhung cong) OR (dung cong)) san phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - canh tranh cua ((nhung cong) OR (dung cong)) san phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - canh tranh cua ((nhung cong) OR (dung cong)) san phan cau".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - canh tranh cua ((nhung cong) OR (dung cong)) san phan cau*.