Hi Vinod,
LIKP and LIPS are Delivery Header and item table and common field is VBELN.
VTTK is shipment header table and its key field is TKNUM; you will find "Z_TRANSPORTNO" in LIKP.
VBUK: VBELN can link with LIKP.
VEKP: Key field is VENUM, but not able to get link with any of the 4 table; please ask functional fellow for this; how to link this table.
Thanks,
Dharmishta