termfreq(text,'multiple word search') not working multiple word

I am using default solr (default solr 5.4.1)) on ubuntu at localhost.
It just works fine like (http://192.168.200.23:8983/solr/techproducts/query?q='blood'&fl=id,title,author,content,counts:termfreq(text,'blood')&start=10)

Working:
eg. for single keyword count like termfreq(text,'blood')
Not Working:
eg. for multiple keyword count like termfreq(text,'white blood cell')
We need to know how it is working and what configuration need to do in solr?

Thanks in advance...