The wildcard * adds flexibility to your search term to maximise your search results. By default, the Hava search expects an exact match and is case sensitive.
For example, to create a custom environment made up of all VPCs in the region us-east-2.
One way to create this would be to add each vpc:id to the search like in the below example.
region:us-east-2 and (vpc:123 or vpc:abc or vpc:456 or vpc:xyz
This can be simplified using the wildcard like in the below example.
region:us-east-2 and vpc:*
Common reasons the wildcard search returns empty.
Incorrect Position
The wildcard search is only a single wildcard character at the end of the string.