Perhaps you should try some spelling variations:
manpower resources » power resources, manager resources, power resource
managed resources » manage resources, manager resource, manage resource
27 costs » 2.7 costs, 27 costas, 17 costs
23 costs » 2.3 costs, 3 costs, 13 costs
11 costs » 11 cost, 1 costs, 11 codes

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %((manpower resources) OR (((unmanaged resources) OR (managed resources)))) %((((((27 costs) OR (23 costs))) OR (2 cost))) OR (11 costs))%22.
• Adding a wildcard symbol may retrieve word variants: %((manpower resources) or (((unmanaged resources) or (managed resources)))) %((((((27 costs) or (23 costs))) or (2 cost))) or (11 costs))%22*.