Perhaps you should try some spelling variations:
15 developpement » de developpement, le developpement, et developpement
developpement de » developpement des, developpement durable
explanations 3 » explanations _, explanations 1, explanations 4
business case » business cycle, business climate
de afrique » de l'afrique, en afrique, l afrique
3 chinese » _ chinese, a chinese, 2 chinese
case cost » cases cost, case case, use cost
cost 15 » cost 12, cost 5, cost 11.5

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

• Adding a wildcard symbol may retrieve word variants: technology _ explanations 3 chinese business case cost 15 developpement de afrique.*.