When you click search Windows 8 assumes you want to search the current application if that application has registered a Search "contract." If it has not, Windows 8 will assume you want to search the applications, as shown in the figure (click on the figure for full size).
I guess you came to this post by searching similar kind of issues in any of the search engine and hope that this resolved your problem. If you find this tips useful, just drop a line below and share the link to others and who knows they might find it useful too.
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