Perhaps you should try some spelling variations:
nhanh thanh » nhanh tinh
phan thanh » pham thanh, ban thanh, van thanh
nhung cong » dung cong, thong cong, hang cong
hieu lang » chieu sang, hieu quang, nhieu tang
van nhung » van nhuong, va nhung, van hung
cong san » cong tac
toan tap » toan ban
toan cao » toan ban
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 - ((nhanh thanh) OR (phan thanh)) van nhung cong san ((toan tap) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((nhanh thanh) OR (phan thanh)) van nhung cong san ((toan tap) OR (toan cao))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((nhanh thanh) OR (phan thanh)) van nhung cong san ((toan tap) or (toan cao))*".