Perhaps you should try some spelling variations:
"spiritual interconnection" » "optical interconnection", "digital interconnections", "optimal interconnection"
"optical interconnections" » "optical interconnects"
"partial interconnection" » "partial interconnections", "particles interconnection", "vertical interconnection"
"optical interactions" » "chemical interactions", "biological interactions"

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: (((("optical interconnections") OR ("optical interactions"))) OR ((("partial interconnection") OR ("spiritual interconnection"))))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"optical interconnections\") OR (\"optical interactions\"))) or (((\"partial interconnection\") or (\"spiritual interconnection\"))))*".
• Removing quotes may allow a broader search: (((( optical interconnections ) OR ( optical interactions ))) or ((( partial interconnection ) or ( spiritual interconnection ))))*.