Searching in Outlook Without Keywords?

The traditional way of searching for information is those kind of key texts. So in other words, if I describe a concept in my search query, but without a specific word, the system can still link that concept to an email or an attachment that I'm looking for. My understanding is pretty much what you might explain a concept. Maybe it's different, but my understanding of what GBT could do in terms of understanding reasoning and then searching information would just make searching information faster and quicker.