Perhaps you should try some spelling variations:
2.2 communications » 2.2 communication, 4.2 communications, 3.2 communication
die developpement » de developpement, le developpement, du developpement
technology trade » technology trends, technology transfer, technology transfers
developpement en » developpement et, developpement des, developpement de
trade action » trade section, trade sanctions, trade taxation
action bayes » action based, action bar, action boris
bayes rules » bayes rule, basis rules, stages rules
rules 2.2 » rules 3.2, rules 4.2, rules 4.3

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

• Adding a wildcard symbol may retrieve word variants: technology trade action bayes rules 2.2 communications _ die developpement en afrique.*.