Perhaps you should try some spelling variations:
4.1 communication » 4 communication, 2.3 communication, 3.2 communication
et developpement » de developpement, le developpement, test development
developpement en » developpement et, developpement des, developpement de
transfer across » transfer costs, transfer accounts
across wages » across ages, gross wages, across age
wages rice » wages race, wages prices, wage price
efforts et » efforts _, effets et, effors pt
rice 4.1 » rice 2.1, rice 3.1, rice 1

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

• Adding a wildcard symbol may retrieve word variants: technology transfer across wages rice 4.1 communication efforts et developpement en afrique.*.