Khmer Unicode in SQL 2014

We need to have our database
  . Collation as SQL_Latin1_General_CP850_BIN
  . Defined fields as NChar, NVarchar, ...


When insert we need to use such syntax as :

insert into tblUser(Name) VALUES(N'សួស្តី')

insert into tblUser(Name) VALUES(N'វាសនា')

insert into tblUser(Name) VALUES(N'ស្រីអៀប')

And When we do some search we need to applied : 



select * from tblUser
where Name LIKE N'%សន%'