Perhaps you should try some spelling variations:
4.2 communications » 4.2 communication, 3.2 communication, 6.2 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 section » trade sector, trade action, trade sanctions
section bayes » section based, section case, section codes
bayes rules » bayes rule, basis rules, stages rules
rules 4.2 » rules 3.2, 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 section bayes rules 4.2 communications _ die developpement en afrique.*.