Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
tranh va » tranh van, trang va, trinh va
van tuan » van quan, van ban, anh tuan
tuan cau » toan cau, quan cau, tuan cu
ho hieu » ho chieu, hoi hieu, nho hieu

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

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