Perhaps you should try some spelling variations:
harbor laboratory » labor laboratory, mirror laboratory, behavior laboratory
laborg laboratory » labor laboratory, lab laboratory, loading laboratory
word working » world working, work working, works working
world spring » world shewing

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: ((word working) OR (world spring)) ((harbor laboratory) OR (laborg laboratory))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((word working) or (world spring)) ((harbor laboratory) OR (laborg laboratory))*".