Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
data communication » data communications
formulation des » formation des, formulacion de, formulation _
technologies a » technologies _, technologies 4, technologies 2
12 development » 1.2 development, 12 developments, 2 development
a formulation » la formulation, _ formulation, 3 formulation
development l » development li, development 1, development law
barriers 12 » barriers 10, barriers 2, barriers 3.2
does data » does cat
l afrique » en afrique
des does » des doses, der does, des dorfes

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

• Adding a wildcard symbol may retrieve word variants: technologies a formulation des does data communication barriers 12 development l afrique.*.