Perhaps you should try some spelling variations:
"intermolecular interaction" » "intermolecular interactions", "molecular interaction"
"molecular interactionss" » "molecular interaction", "bimolecular interactions", "molecule 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 interaction") OR ("molecular interactions"))) OR ("molecular interactionss")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"intermolecular interaction\") OR (\"molecular interactions\"))) or (\"molecular interactionss\"))".
• Removing quotes may allow a broader search: (((( intermolecular interaction ) OR ( molecular interactions ))) or ( molecular interactionss )).
• Adding a wildcard symbol may retrieve word variants: (((("intermolecular interaction") OR ("molecular interactions"))) or ("molecular interactionss"))*.