Perhaps you should try some spelling variations:
case communication » based communication, scale communication, face communication
development eco » development second, development east, development menu
de variation » der variation, die variation, does variation
typology de » typology _, typology 6, typology a
eco afrique » en afrique
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 eco afrique.~".
• Adding a wildcard symbol may retrieve word variants: typology de variation _ costs case communication ((pt sme) OR (pt semen)) development eco afrique.*.