Perhaps you should try some spelling variations:
information survey » information sources, information source, information series
tests information » costs information, gets information, testing information
technology tests » technology thesis, technology best, technology costs
de communication » mobile communication, online communication
developpement en » developpement et, developpement des, developpement de
4 developpement » de developpement, le developpement, et developpement
survey garde » survey burden, survey area, survey cadre
garde de » garde _, guide de, aude de
costs 4 » costs _, costs a, costs 4.2

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

• Adding a wildcard symbol may retrieve word variants: technology tests information survey garde de communication costs 4 developpement en afrique.*.