Perhaps you should try some spelling variations:
positive communication » positive communications, proactive communication, passive communication
4 developpement » de developpement, le developpement, et developpement
has positive » have positive, hiv positive, a positive
des afrique » en afrique, de l'afrique
social a » social _, social 4, social aid
costs 4 » costs _, costs a, costs 4.2
a has » _ has, 1 has, 3 has

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

• Adding a wildcard symbol may retrieve word variants: methods overview social a has positive communication costs 4 developpement des afrique.*.