Perhaps you should try some spelling variations:
luong hieu » guong hieu, huong hieu, long hieu
dung dang » dung dan, dung dong, dung danh
dang phan » dung phan, nang phan, dang phat
phan kien » van kien
kien soat » kiem soat, bien soan, kien hoa
van luong » van duong, van cuong, nang luong
hieu luat » hieu qua
dung van » duong van, dung va, dang van

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tin dung dang phan kien soat ) or ( tin dung van luong hieu luat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tin dung dang phan kien soat ) OR ( tin dung van luong hieu luat )).
• Adding a wildcard symbol may retrieve word variants: (( tin dung dang phan kien soat ) or ( tin dung van luong hieu luat ))*.