The search function for services in ArcGIS Online should be more extended. You should be able to search on date, i.e. 2010 or to search for a timeperiod (1990 to 2000).
Also, the area to be searched. For example, only results which are in the AOI or specified location (Provinces, municipalities, etc., etc.)
Third, the use of wildcards will come in handy. If you don't know how something is called, you can use wildcards.
We use a ArcGIS for Organisation and the students have to search services. I think it will be good to implement this search functionality.
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