Here is a pretty good, basic video on VES (vent, enter and search). It has good demonstration points from the beginning of the operation to the complete search of one room. The thing I like about this video is the use of two persons for the VES.
Although this can be done with one person, you must weigh the risk vs. benefit, it is ideal to do this with two people. However your department chooses to perform this function, you must train regularly.
One thing that is not mentioned in the video is the fact that personnel performing VES must be highly trained and experienced. Knowing how to read changing conditions, fire behavior and building construction is a must.
Keep on training and stay safe out there.