Perhaps you should try some spelling variations:
communication barriers » communication series, communication disorders
de communication » mobile communication, online communication
formulation do » formulation de, formulation du, formulation des
19 development » 19 developments, 1 development, 11 development
development en » developpement en, development menu, development eco
barriers 19 » barriers 10, barriers 1.1, barriers 1.3
do does » do dogs, der does, who does
does de » does debt

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

• Adding a wildcard symbol may retrieve word variants: technologies _ formulation do does de communication barriers 19 development en afrique.*.