Kendo UI DropDownList search result capital as well as small

I have Kendo UI DropDownList having different types of data including capital & small types. I would like to search result capital as well as small.

 

Suppose my DDL contains

1) KG

2) CM

3) Meter

4) Gram

 

If I type 'm'  then DDL should filter with records CM,Meter & Gram vice versa. 

 

How can I achieve this.

Thanks in advance