Perhaps you should try some spelling variations:
luong quan » thong quan, duong qua
dinh luong » dinh duong, dinh huong, dinh cuong
hieu hoat » hieu hoa, thien hoat, hieu luat
hien soat » thien hoat, kiem soat, bien soan
dung lan » dung luan, dung land, dung san
dung lam » dung luan, dung tai, dung dat
van hieu » cao hieu
quan van » luan van, quan va, quan luan
van hien » van tien

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( tinh ((dung lan) OR (dung lam)) van hieu hoat ) or ( dinh luong quan van hien soat ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( tinh ((dung lan) OR (dung lam)) van hieu hoat ) OR ( dinh luong quan van hien soat ))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( tinh ((dung lan) OR (dung lam)) van hieu hoat ) or ( dinh luong quan van hien soat ))*".