Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
chieu sang » chieu sach, chieu xanh, nhieu tang
hieu lang » hieu quang, nhieu tang, hieu van
hang cong » dang cong, hang nong, bang cong
tranh vi » trinh vi, tranh va, tranh cai
tan toan » tan tran, tap toan, van toan
toan tap » toan ban

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 vi ((nhung cong) OR (hang cong)) tan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sang) OR (hieu lang)) - canh tranh vi ((nhung cong) OR (hang cong)) tan toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sang) or (hieu lang)) - canh tranh vi ((nhung cong) OR (hang cong)) tan toan tap".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sang) or (hieu lang)) - canh tranh vi ((nhung cong) OR (hang cong)) tan toan tap*.