Perhaps you should try some spelling variations:
1990 communication » 10 communication, 19 communication, 1 communication
over development » power development, river development, order development
development case » development china
function plan » function pt, function a, function bias
technology 1 » technology _
plan policy » land policy, urban policy
policy 1990 » policy 10
case aortic » acute aortic
1 function » 1 functions, 10 function, 11 function
costs over » costs other, contests over

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

• Adding a wildcard symbol may retrieve word variants: technology 1 function plan policy 1990 communication costs over development case aortic.*.