Perhaps you should try some spelling variations:
technology challenges » technological challenges, technology change, technical challenges
3 communication » 4 communication, de communication, data communication
informality c » informality _, informality a, informality 5
development l » development li, development 1, development law
l afrique » en afrique
a sme » 3 sme, 5 sme, a see
_ sme » _ smes
c do » _ do, c d, 1 do
do 3 » do _, do i, do a

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: "technology challenges informality c do 3 communication ((a sme) OR (_ sme)) development l afrique.~".
• Adding a wildcard symbol may retrieve word variants: technology challenges informality c do 3 communication ((a sme) OR (_ sme)) development l afrique.*.