The Google search will apply your minimum size filter from Tags (2), so see if you get better results by changing that value.
You can also enter a Google search as an external tool. I have it configured as follows:
application path: <your browser>
parameters: <see edit>
There might be a way to include the size filter in the URL, but I haven't tried.
Added: this would be useful for me, too, so I've worked it out. This will give you a google image search restricted to 800x600 or larger:
https://www.google.com/search?tbm=isch&tbs=isz:lt,islt:svga&as_q="$Replace(<Album Artist>,&,"%26") $Replace(<Album>,&,"%26")"