Perhaps you should try some spelling variations:
ressources development » resources development, resource development, resource developments
strategy creation » strategy creating, strategy section, strategy coercion
gnp development » gdp development, amp development, up development
et ressources » des ressources, les ressources, de ressources
real gnp » real gdp

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( real gnp development strategy based ) or ( et ressources development strategy creation ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( real gnp development strategy based ) OR ( et ressources development strategy creation )).
• Adding a wildcard symbol may retrieve word variants: (( real gnp development strategy based ) or ( et ressources development strategy creation ))*.