Perhaps you should try some spelling variations:
oral communication » personal communication
developing areas » developing asia, developing east, developing a
technologies 2 » technologies _, technologies 4
2.3 developing » 3.3 developing, 2.2 developing, 1.3 developing
information 1 » information 2, information 3, information 3.2
areas access » farmers access, cartels access, markets access
when oral » when formal, when coal, when goal
costs 2.3 » costs 4.2, costs 4.4
1 when » 19 when, 3 when, 4 when

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

• Adding a wildcard symbol may retrieve word variants: technologies 2 information 1 when oral communication costs 2.3 developing areas access.*.