Perhaps you should try some spelling variations:
study confirmation » side confirmation, de confirmation, equal confirmation
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
confirmation war » confirmation bias, confirmation page, confirmation _
developpement en » developpement et, developpement des, developpement de
war bad » war bands, war baby, war bond
bad 4.1 » based 4.1, bond 4.1, hand 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology study confirmation war bad 4.1 communication costs _ developpement en afrique.*.