Perhaps you should try some spelling variations:
manpower resources » power resources, manager resources, power resource
unmanager resource » unmanaged resources, manage resource, managed resource
manager resource » managing resource, management resource, unmanaged resources
27 costs » 2.7 costs, 27 costas, 17 costs
23 costs » 2.3 costs, 3 costs, 13 costs
21 costs » 21 cost, 1 costs, 11 costs
4 costs » _ costs, 2 costs

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 (((unmanager resource) OR (manager resource)))) %((((((27 costs) OR (23 costs))) OR (((4 costs) OR (4 cost))))) OR (21 costs))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((manpower resources) or (((unmanager resource) or (manager resource)))) %((((((27 costs) or (23 costs))) or (((4 costs) OR (4 cost))))) or (21 costs))%22".
• Adding a wildcard symbol may retrieve word variants: %((manpower resources) or (((unmanager resource) or (manager resource)))) %((((((27 costs) or (23 costs))) or (((4 costs) OR (4 cost))))) or (21 costs))%22*.