Perhaps you should try some spelling variations:
communication model » communication media
technologies chief » technologies case, technologies chapter, technologies cookies
data communication » data communications
step development » system development, foster development, crop development
model step » model setup, model set, model scip
a afrique » l afrique, en afrique
de data » e data, wide data, de datos

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies chief information _ de data communication model step development a afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies chief information _ de data communication model step development a afrique.*.