Perhaps you should try some spelling variations:
cong luong » cong thuong, nang luong, cong dong
cong dung » cuong dung, cong dong, thong dung
xuyen tai » xuyen tac, nguyen tai, truyen tai
cac thu » cach thuc, cac thoi
cac khu » cac khoi, cac kieu
ke lay » ke xay, ke may, ke lam
ke ly » kem ly, ke ky, ke y

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

• Performing a fuzzy search may retrieve terms with similar spellings: xuyen tai ((cac khu) or (cac thu)) đe co ban ((ke ly) OR (ke lay)) ve ((cong dung) or (cong luong))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: xuyen tai ((cac khu) OR (cac thu)) đe co ban ((ke ly) OR (ke lay)) ve ((cong dung) OR (cong luong)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "xuyen tai ((cac khu) or (cac thu)) đe co ban ((ke ly) OR (ke lay)) ve ((cong dung) or (cong luong))".
• Adding a wildcard symbol may retrieve word variants: xuyen tai ((cac khu) or (cac thu)) đe co ban ((ke ly) OR (ke lay)) ve ((cong dung) or (cong luong))*.