Perhaps you should try some spelling variations:
time distributions » time distribution, size distributions, stable distributions
2turf developing » stuff developing, future developing, nature developing
turf developing » stuff developing, future developing, tariff developing

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

• If you are trying to use Boolean operators, they must be ALL CAPS: %((income distribution) OR (time distributions)) %((2turf developing) OR (turf developing)) countries%22.
• Adding a wildcard symbol may retrieve word variants: %((income distribution) or (time distributions)) %((2turf developing) or (turf developing)) countries%22*.