Unless you want to have to manually select every occurrence of 'National spatial plan of zone one', you should use an ordinary Find/Replace, with:
Find = National spatial plan of zone one
Replace = NationalSpatialPlanOfZoneOne
or:
Find = National spatial plan of zone one
Replace = Nationalspatialplanofzoneone

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]