BuddyPress.org

hello, I’m making a community for college students and I want to use the automatic profile fields in search but not just with one field only, I want to mix grade with faculty or with level and so on, will make a separate page and link to different keywords, for example that is how it show in single field when clicked:

http://example.com/members/?s=keyword1

I wanted to put a link mixing another keyword to refine search, by adding the plus sign like that:

http://example.com/members/?s=keyword1+keyword2

unluckily this didn’t work, so is there any other way to do this, I just want to know how to achieve this in terms of links if it can be?