Package Manager does not display any result on searching "SDF" keyword for Text mesh pro Package

Steps to repro:
1. Create a new project.
2. Windows > Package Manager.
3. In the Search field Enter "SDF" keyword.

Actual result:
No result found for "SDF" keyword.

Expected result:
Text mesh pro Package is displayed in the search result.

Package Version :
2.0.1, 2.0.0, 1.4.1

Tested in Unity Version:
2019.3.0a3. 2019.2.0b2.

Environment:
Windows & Mac.