Perhaps you should try some spelling variations:
drivers development » driven development, river development, drive development
development centers » development center, development partners, development chapter
communication cost » communication costs, communication costa, communications costs
relative incomes » relative income
4 communication » 3 communication, 5.4 communication, de communication
technology 1.2 » technology 2.2, technology 3.2, technology 1.1
incomes policy » notes policy
1.2 relative » 1.2 relatives, 2.2 relative, 1.3 relative
cost drivers » bus drivers, car drivers
policy 4 » policy 1, policy 3, policy 5

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

• Adding a wildcard symbol may retrieve word variants: technology 1.2 relative incomes policy 4 communication cost drivers development centers _.*.