Perhaps you should try some spelling variations:
class communication » mass communication, plans communication, crisis communication
communication cost » communication costs, communication costa, communications costs
information 2.2.3 » information 23.2.3, information 2.2.2, information 2.2.6
technologies 4 » technologies _
4 information » 2 information, 1 information
3d developing » 3 developing, 3.3 developing, 3.2 developing
2.2.3 why » 2.2.1 why, 2.2.2 why, 4.2.3 why
why class » my class, why case, why cdss
cost 3d » cost 3.2, cost 3.4, cost 3.5

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

• Adding a wildcard symbol may retrieve word variants: technologies 4 information 2.2.3 why class communication cost 3d developing _ access.*.