Where to look?

My gr grandmother GERGINA OLINE OLSON was born May 14, 1873 in Trondheim. She emmigrated to the US in 1893, but I cannot find any further information on her. I would like help finding how she came to the US and I have searched many passenger list trying to find her. She came to the US to marry Johan Bernhof Hanson (born Jan 19, 1866 in Christensen. came to US in 1892) We believe through family tales he came through Canada. Any help would be appreciated.