Could you provide more information on what you are trying to accomplish?
That said, implementation of search feature is currently pending. We have plans to add this feature in future, in SeedMe2.
A bit more specific search is available via web services or command line client. For example if a user wants to identify a collection that has a key:value pair the following command returns a collection id. The query is only executed on user's collection and not globally.
./seedme.py -query -keyvalue "pressure:1 Mpa"