Perhaps you should try some spelling variations:
nhieu tang » chieu sang, nhiet nang
viec thong » viec thuong, vien thong, viet thong
hieu lang » chieu sang, hieu quang, hieu van
dung cong » dung trong
manh cua » doanh cua
thong tu » phong tuc, thong tin, thong ke
ban cua » ban quan

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

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