Total 37 Tickets on Zoho Desk but getting only 16 while fetching from API

Total 37 Tickets on Zoho Desk but getting only 16 while fetching from API

On the Zoho Desk App (https://desk.zoho.in/support), in total there are 37 Tickets for a particular user. But when we try to fetch those tickets via API, we receive only a few results in response. 

Please find the details of the API used to fetch tickets below:
API endpoint: https://desk.zoho.in/api/v1/tickets/search
Query Params: email=abc@xyz.com

The final URL becomes: https://desk.zoho.in/api/v1/tickets/search?email=abc@xyz.com

Using the above URL, when we try to fetch the data, we only receive 16 results only.

Please help us out.

I really appreciate any help you can provide.