Perhaps you should try some spelling variations:
5.4 communication » de communication, data communication
power development » water development, career development, hydropower development
communication 4 » communication _, communication a, communication 3
development en » developpement en, development menu, development eco
variation im » variation _, variation 6, variation des
typology de » typology _, typology a, typologie des
typology 6 » typology _, typology 4.1
soe 5.4 » mode 5.4, size 5.4, zone 5.4
4 power » 2 power, 3 power
im soe » im sog

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) OR (typology 6)) variation im soe 5.4 communication 4 power development en afrique.~".
• Adding a wildcard symbol may retrieve word variants: ((typology de) OR (typology 6)) variation im soe 5.4 communication 4 power development en afrique.*.