How to use Data Pump to backup and restore all my Oracle Primavera Data base? I just want to expdp a

How to use Data Pump to backup and restore all my Oracle Primavera Data base?

I did on my database as system dba

create directory BKFOLDER as 'c:/backup/export';

expdp system/Prima123Vera DIRECTORY=BKFOLDER DUMPFILE=bkob1ob2.dmp full=y


Then on other database I did

create directory BKFOLDER as 'c:/backup/export'; 

impdp system/Prima123Vera DIRECTORY=BKFOLDER DUMPFILE=bkob1ob2.DMP full=y

Then at the end I saw log import log file and there are 8068 warning or error, but I decided to login from P6 Client and there were all my projects,
I ran a validate and did not show error on the html file. All my data is ok. But I would like to expdp only the tablespace or my pmdb database and impdp