Perhaps you should try some spelling variations:
child development » world development
development after » developments after, development master, development matter
pt communication » put communication, et communication, post communication
after abortion » safe abortion, anti abortion, after action
relations 1.2 » relations 3.2, relations 1.1, relations 5.2
costs child » costs china
1.2 crisis » 10.2 crisis, 13.2 crisis, 15.2 crisis
crisis pt » crisis _, crisis a

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

• Adding a wildcard symbol may retrieve word variants: technology _ relations 1.2 crisis pt communication costs child development after abortion.*.