How to increase Vrbo Bookings?

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I've read quite a few posts about other hosts receiving the majority of bookings through Vrbo and that is just not the case for me and I'm curious as to why. I started off using Lodgify as a pms system and now I'm using Hostfully. My airbnb and booking.com bookings have always been 90% of my bookings and I've only had maybe 4 Vrbo bookings this year. What am I doing wrong? The listings were imported from my pms system so they weren't manually entered in Vrbo. The units are doing great on Airbnb and Booking.com but I've had no success with Vrbo all around. 

How can I change this? How can I get more bookings with Vrbo?