I might can help you and I might not.

source: 
LAGS
Entry: 
266
Example: 
I might can help you and I might not.
Modal 1: 
might
Modal 2: 
can
Gender: 
Male
Race/Ethnicity: 
White
Age: 
67
Level of Education: 
High school
Home Community, Town, or State: 
TX (Matagorda)
Location Collected: 
TX (Matagorda)
Year: 
1975
Relation to Addressee: 
subject to fieldworker
Medium: 
Spoken
Sentence Structure: 
1.1
Status: 
Naturalistic