Perhaps you should try some spelling variations:
"intermolecular detection" » "intermolecular electron", "intermolecular interaction", "intermolecular reactions"
"molecular interaction" » "molecular interactions", "molecular detection", "intermolecular 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: (("intermolecular detection") OR ("molecular interaction")).
• Removing quotes may allow a broader search: (( intermolecular detection ) or ( molecular interaction )).
• Adding a wildcard symbol may retrieve word variants: (("intermolecular detection") or ("molecular interaction"))*.