Perhaps you should try some spelling variations:
manpower resources » power resources, power resource, manager resource
manager resources » manager resource, managed resources, manage resource
manage resources » managed resources, manage resource, manager resource
21 costs » 21 cost, 1 costs, 11 costs
2 costs » _ costs, 2 cost, 5 costs
4 costs » _ costs, 4 cost

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 (((manager resources) OR (manage resources)))) %((((2((2 costs) OR (4 costs))) OR (((2 costs) OR (4 costs))))) OR (21 costs))%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%((manpower resources) or (((manager resources) or (manage resources)))) %((((2((2 costs) OR (4 costs))) or (((2 costs) OR (4 costs))))) or (21 costs))%22".
• Adding a wildcard symbol may retrieve word variants: %((manpower resources) or (((manager resources) or (manage resources)))) %((((2((2 costs) OR (4 costs))) or (((2 costs) OR (4 costs))))) or (21 costs))%22*.