how can i make a search form through which i can fetch data ?

You could save all values into one big local variable.

Then use the one variable you just created, passing as arguments into the expression rule that you use to query into your database directly.

Thanks Arosario , Can you please show it via an example if possible

1. create local variables for each text field as null,

2. the variable you create to hold those values:

i'm assuming that you have created a cdt

local!filter: 'type!{urn:com:appian:types}CDT_TYPE_EXAMPLE'(
firstName: local!firstName,
lastName: local!lastName,
location: local!location,
applicationType: local!applicationType,
applicationStatus: local!applicationStatus,
fromDate: local!fromDate,
toDate: local!toDate
)

3. each textField you need to save them using "saveInto" from textField properties

4. create a local variable to hold your data from an expression rule which is querying through your database.

5. you will have something like this:

local!data: rule!EXPRESSION_RULE_QUERY_DATABASE(
firstName: local!firstName,
lastName: local!lastName,
location: local!location,
applicationType: local!applicationType,
applicationStatus: local!applicationStatus,
fromDate: local!fromDate,
toDate: local!toDate
)

The reason for doing this is letting your search be more dynamic

Yeah got it , Thank you for explaining in a fantastic way. 

Yeah got it , Thank you for explaining in a fantastic way.