Hello @Saravanan Sukumaran,
If you want to continue using the Dropdown Search widget, then:
1. For the aggregate 'Max Records' you can set a number higher than 50 per your needs.
2. For the # of search results displayed, you can increase it to a number of your choice for e.g. 10 by placing the following code in the 'Advanced Format' property:
"{
searchResultLimit:10,
shouldSort:false
}"
Regards,
AJ