I might could help you.

source: 
LAGS
Entry: 
479
Example: 
I might could help you.
Modal 1: 
might
Modal 2: 
could
Gender: 
Female
Race/Ethnicity: 
White
Age: 
80
Level of Education: 
8th grade
Home Community, Town, or State: 
TX (Noonday)
Location Collected: 
TX (Marshall)
Year: 
1974
Relation to Addressee: 
subject to fieldworker
Medium: 
Spoken
Sentence Structure: 
1.0
Status: 
Naturalistic