Perhaps you should try some spelling variations:
communication models » communications models, communication model, communication modes
use development » case development, sme development, e development
development co » development case, development china
does mobile » das mobile
models use » models used, model use, models useful
co afrique » en afrique, l afrique
gap does » gap die, lcp does

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

• Performing a fuzzy search may retrieve terms with similar spellings: technologies _ information gap does mobile communication models use development co afrique.~.
• Adding a wildcard symbol may retrieve word variants: technologies _ information gap does mobile communication models use development co afrique.*.