Perhaps you should try some spelling variations:
case communication » based communication, scale communication, face communication
development en » developpement en, development menu, development eco
de variation » der variation, die variation, does variation
typology de » typology _, typology 6, typology a
costs case » costs cash
pt semen » _ semen

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "typology de variation _ costs case communication ((pt sme) OR (pt semen)) development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology de variation _ costs case communication ((pt sme) OR (pt semen)) development en afrique.*.