Hi Praveen!
Grails searchable plugin uses Lucene's StandardAnalyzer so if you declared index properties as "analyzed" then are lowercased to normalize it, so.. it doesn't matter if you have:
Praveen Kuma race ............................
Praveen Kumar Race ..............................
Praveen race ....................................
they will always be indexed as:
praveenkumarace ............................
praveenkumarrace ..............................
praveenrace ....................................
and your search term will be normalized too.
If you don't want to normalize you could use "not_analyzed" and it's value will reamain verbatim in the index.
I recommend you to read
http://grails.org/Searchable+Plugin+-+Analyzers if you want to know more about them.
Regards,
Serch