Perhaps you should try some spelling variations:
4.2.2 communication » 4.2.1 communication, 4.2.4 communication, 8.2.2 communication
technology debts » technology debate, technology data, technology dlt
developpement en » developpement et, developpement des, developpement de
debts inflation » der inflation, does inflation, debt deflation
a developpement » au developpement, de developpement, le developpement
pt 4.2.2 » 1 4.2.2, 2 4.2.2, 4 4.2.2
rate pt » rates pt, rate peg, state pt
costs a » costs _, costs 4

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

• Adding a wildcard symbol may retrieve word variants: technology debts inflation rate pt 4.2.2 communication costs a developpement en afrique.*.