Perhaps you should try some spelling variations:
4.3 communication » 2.3 communication, 4.1 communication, 4 communication
inflation space » information space, innovation space, inflation rate
envelopment law » development law, redevelopment law, development land
technology 4ir » technology 4, technology 4.1, technology 4.2
4ir inflation » der inflation, die inflation, aid inflation
space space » space place, place space, space race
law afrique » l afrique
costs data » cost data
space 4.3 » space 3.3, space 2.1, space 3.2

You may be able to get more results by adjusting your search query.

• Adding a wildcard symbol may retrieve word variants: technology 4ir inflation space space 4.3 communication costs data envelopment law afrique.*.