Perhaps you should try some spelling variations:
6.13 communication » 6.1.3 communication, 2.3 communication, 4.1 communication
technology price » technology rich, technology voice, technology service
developpement de » developpement des, developpement durable
inflation write » inflation rate, inflation crises, inflation rates
write case » site case, variate case
de matrice » de maitrise, la matrice, de marie
case 6.13 » case 6.3, case 6.1, case 6.12

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

• Adding a wildcard symbol may retrieve word variants: technology price inflation write case 6.13 communication costs _ developpement de matrice.*.