LookUpEdit to search for any word contains then list

Question

Hello All,

I need to make searchable comobox to autocomplete with any word matches in the column.

how to code search any word from the data table specific column instead searching from begining..

Datasource contains value as below.,

Mohan Raj

Raj Kumar

Raj Kiran

Ganesh Kumar

Outout Required as below

when lookupedit typed raj, auto complete should suggest all the name under raj.

please guide me how to achive this searchable option..