There are multiple bus routes that stop nearby campus Haraldsplass, Bergen. In addition to that, direct routes (worker routes) is running between parts of town and Haukeland University Hospital, which is nearby. Skyss.no has time tables and overview of bus stops.
Tide, NOR-WAY bussekspress and Nettbuss has express busses on long distance routes to Bergen city centre from multiple locations.
Are you travelling from Bergen city centre to campus Haraldsplass, we suggest bus number 2, 3 or 80 from bus stop Småstrandgaten (outside Exhibition shopping mall). A bus leaves from there every ten minutes during the day. Get off at bus stop Haukeland sykehus Nord (before the tunnel) and walk the rest.