In your search results you can click on "..." beside Company to choose your Favorites Companies. The bearings of these Favorites Companies will appear first in your searches results and they will be flagged with a green heart .
This ways BS will let you now if your Favorites Companies have what you need, and you will save your time.
You can also select your Favorite Companies in "My BS - My Profile" option menu. You may designate up to 5 Favorites Companies and you can sort your Favorites by dragging the company name to the position you want: