Multiple Where

OS: RHEL 6.10

DB: Oracle RAC 2 Nodes, 11.2.0.3.0

Question:  I need to run following query, I can run it one at a time, but I would like to get one output..  Is there a way to do it ?

I tried this but it didn't work:   select * from account where num_ref = 'abc634800' , 'abc729597','abc880331','abc037366','abc048227';

this works, one at a time:    select * from account where num_ref = 'abc634800';

                                           select * from account where num_ref ='abc729597';

                                           select * from account where num_ref ='abc880331';

                                          etc, etc.

I have tried Google but I could not find a solution.  Thanks for your help.