Perhaps you should try some spelling variations:
2.3 communication » 3.2 communication, de communication, 4 communication
trade development » software development
technology right » technology rights, technology high, technology rich
right infection » right insertion, right intention, right direction
infection data » infection rate, infection rates, section data
development la » development law, development li, development land
costs trade » costly trade
la afrique » l afrique, la fabrique, en afrique
data case » data base, data based
case 2.3 » case 3, case 4.1, case 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology right infection data case 2.3 communication costs trade development la afrique.*.