when you apply a book of knowledge item to add experience points for your hero you get the same message of "experience points applied & experience points added" but the points added are higher than the points applied. i'm guessing because of hero experience knowledge or experience booster...

so i would like to know if there is a possibility to have more VIP points added than applied (to maximise my stock of VIP points items )

Ahhh, gotcha... And the reply is no, unfortunately.

 I've never experienced receiving more than the VIP points applied from your inventory.