Perhaps you should try some spelling variations:
technology survey » technology surveys, technology curve, technology series
survey imputation » survey implementation
4.2 communication » 4.2 communications, 3.2 communication, 4.1 communication
les developpement » le developpement, des developpements, leur developpement
imputation state » simulation state, competition state, simulation states
developpement l » developpement il, developpement la, developpement de
state shares » trade shares, state space, state series
shares 4.2 » shapes 4.2, shared 4.5, shares 1.4
l afrique » en afrique
a les » a lens, a less, 2 les

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

• Adding a wildcard symbol may retrieve word variants: technology survey imputation state shares 4.2 communication a les developpement l afrique.*.