I have search service application configured.
Suppose my first name is "frankmartin" (no spaces)
When I search "frankmartin" then it displays search results in both "People" and "Site" search. But when I search "frank" it doesn't display any search result. Why is that?
EDIT
I am not using advanced search and have made this search results page using those search web parts which you can add in page to display results.