Perhaps you should try some spelling variations:
mirror laboratory » monitor laboratory, inter laboratory, air laboratory
labor laboratory » laboratory laboratory, under laboratory, inter laboratory
world spring » world print, world seeing, world securing

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: ((world spring) OR (world during)) ((labor laboratory) OR (mirror laboratory)).
• Adding a wildcard symbol may retrieve word variants: ((world spring) or (world during)) ((labor laboratory) or (mirror laboratory))*.