How to use imdpd to import data file into different schema including index from different tablespace as well
There is only one REMAP_TABLESPACE parameter in de command. 
It would be seperated with ",".
REMAP_TABLESPACE=OLD_SCHEMA_DAT:NEW_SCHEMA_DAT,OLD_SCHEMA_IDX:NEW_SCHEMA_IDX

Oracle doc impdp 11.2
http://docs.oracle.com/cd/E11882_01/server.112/e22490/dp_import.htm#SUTIL929