The Igloo platform does have a Unified Search Widget, which allows users to search for content in different repositories. This widget only works with specific repositories, which are listed in the Knowledge Base article linked above.
If you would like to suggest another method of search integration as a future feature on Igloo, please submit your idea to our Product Zone page here. Once you have registered, you will not only have the ability to submit your ideas, but you will also receive a notification any time the status of the idea gets updated by our Product Team. In addition, you will be able to view ideas that other Igloo users have submitted and up-vote submissions that you are also interested in seeing on the platform.
Please let me know if there is anything else I can assist you with.