Perhaps you should try some spelling variations:
technology challenges » technological challenges, technology change, technical challenges
sme development » trade development
informality 5 » informality _, informality a, informality c
development d » development ds, development 1, development did
d afrique » l afrique, en afrique, de l'afrique
a sme » _ sme, 3 sme, 5 sme
do 3 » do i, do a, o 3

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 5 ((do 3) OR (do _)) communication a sme development d afrique.~".
• Adding a wildcard symbol may retrieve word variants: technology challenges informality 5 ((do 3) OR (do _)) communication a sme development d afrique.*.