Perhaps you should try some spelling variations:
"partial interconnection" » "partial interconnections", "particles interconnection", "vertical interconnection"
"mail interconnections" » "basic interconnections", "chip interconnections", "tool interconnections"

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: (("mail interconnections") OR ("partial interconnection")).
• Removing quotes may allow a broader search: (( mail interconnections ) or ( partial interconnection )).
• Adding a wildcard symbol may retrieve word variants: (("mail interconnections") or ("partial interconnection"))*.