I need some help with either:
1) recommended resources that cover the supposed contradictions between John 6:3-5 and Mark 6:33-34
or / and 
2) the best way to search for these two passages together. Searching <Mark 6:33-34> NEAR <John 6:3-5> or even <Mark 6:33-34> WITHIN 1 WORD <John 6:3-5> yields too many results and speaks only of the general passage (at least mostly; too many results to sort through). 
I'd like to see some critical commentaries that cover this issue. 
Any advice or guidance will be appreciated.