Perhaps you should try some spelling variations:
communication model » communication media
capm developpement » au developpement, de developpement, le developpement
3.1 communication » 3.1 communications, 3.2 communication, 3.5 communication
developpement en » developpement et, developpement des, developpement de
inflation gold » inflation good, inflation gerold, inflation gopi
model capm » model lapm, model ecaps, model can
gold rice » gold price, gold rich, gold prices
rice 3.1 » rice 2.1, rice 3.3, rice 4.1

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

• Adding a wildcard symbol may retrieve word variants: technology _ inflation gold rice 3.1 communication model capm developpement en afrique.*.