Perhaps you should try some spelling variations:
6.4 communication » 5.4 communication, 1.4 communication, 2.4 communication
technology grade » technology trade, technology guides, technology gender
au developpement » du developpement, de developpement, le developpement
grade inflation » price inflation, trade information
inflation rates » inflation rate
communication 3 » communication _, communication a
rates spaces » places spaces, papers spaces, spaces spaces
spaces 6.4 » spaces 6.2, spaces 2.4, spaces 6.1
3 au » 3 auf, 3 a, 3 zu

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

• Adding a wildcard symbol may retrieve word variants: technology grade inflation rates spaces 6.4 communication 3 au developpement _ force.*.