I might could help you.

source: 
LAGS
Entry: 
478
Example: 
I might could help you.
Modal 1: 
might
Modal 2: 
could
Gender: 
Male
Race/Ethnicity: 
White
Age: 
85
Level of Education: 
9th grade
Home Community, Town, or State: 
MS (Bogue Chitto)
Location Collected: 
MS (Bogue Chitto)
Year: 
1973
Relation to Addressee: 
subject to fieldworker
Medium: 
Spoken
Sentence Structure: 
1.0
Status: 
Naturalistic