Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
hieu lang » chieu sang, hieu quang, hieu van
tranh cua » doanh cua, manh cua
hang cong » dang cong, bang cong, thanh cong
hang nong » thang long, han tong
tac tan » tac can, tac van, tat tan
tan ban » toan ban, tang ban, van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((nhieu tang) or (hieu lang)) - canh tranh cua ((hang cong) OR (hang nong)) tac tan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((nhieu tang) OR (hieu lang)) - canh tranh cua ((hang cong) OR (hang nong)) tac tan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((nhieu tang) or (hieu lang)) - canh tranh cua ((hang cong) OR (hang nong)) tac tan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((nhieu tang) or (hieu lang)) - canh tranh cua ((hang cong) OR (hang nong)) tac tan ban*.