Perhaps you should try some spelling variations:
2.3.1 communication » 2.3.1.1 communication, 2.3 communication, 2.2.3 communication
communication phase » communication case, communication based, communication paper
au developpement » du developpement, de developpement, le developpement
developpement en » developpement et, developpement des, developpement de
inflation can » inflation tax, inflation a, inflation co
prices 2.3.1 » prices 2.3.4, prices 2.3.5, prices 2.3.6
can prices » car prices, coal prices, corn prices
phase au » phase a, phase das, phase lag

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

• Adding a wildcard symbol may retrieve word variants: technology _ inflation can prices 2.3.1 communication phase au developpement en afrique.*.