Why API and Simple Text Query results are different

[Piyush-Use-Personal]

I am trying to make an API call on this URL -
https://api.crossref.org/works?query.bibliographic={search-text} and I am receiving the data
But If I copy-paste the search text into the simple test query then it gives a different result.
Why is that, Please help me understand?

note: It is happening for large queries as per my observations. Maybe some spacing issues