Findings:

• Heartstring
• When Your Heartstrings Break
• Heartstrings
• Heartstrings (user)
• tug
• Don't Tug on Superman's Cape
• tug of war
• Rub and tug
• firemen's tug of war
• Tug McGraw
• Tug Hill Plateau
• tug (user)

If you Log in you could create a "tugs at my heartstrings" node. If you don't already have an account, you can register here.