Perhaps you should try some spelling variations:
citation indices » citation index, citati indice, vegetation indices
au developpement » du developpement, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
3 communication » 4 communication, de communication, data communication
indices indice » indice indice, indices index
technology 2 » technology _, technology 1, technology 3
2 citation » _ citation, 3 citation, 5 citation
indice 3 » indices _, indice de, indice di
costs au » costs a, costs amy, costs _

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

• Adding a wildcard symbol may retrieve word variants: technology 2 citation indices indice 3 communication costs au developpement en afrique.*.