Perhaps you should try some spelling variations:
l'application des » l'implication des, l'amelioration des, application du
developing biogas » developing areas, developing global, developing high
developing cities » developing countries, developing annuities, developing economies
developing cross » development cross, developing areas, development across

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "l'application des ((developing cross) OR (((developing biogas) OR (developing cities)))) program.~".
• Adding a wildcard symbol may retrieve word variants: l'application des ((developing cross) OR (((developing biogas) OR (developing cities)))) program.*.