Perhaps you should try some spelling variations:
technology challenges » technological challenges, technology change, technical challenges
informality 2 » informality _, informality a, informality 5
development d » development ds, development 1, development did
d afrique » l afrique, en afrique, de l'afrique
a sme » _ sme, 5 sme, a see
3 sme » 3 same, _ sme, 3 smt
2 co » _ co, a co, 2 c

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 2 co _ communication ((a sme) OR (3 sme)) development d afrique.~".
• Adding a wildcard symbol may retrieve word variants: technology challenges informality 2 co _ communication ((a sme) OR (3 sme)) development d afrique.*.