Generally, {TAIL ~ the order} in which {HEAD ~ the query terms} appear in the query is insignificant 
in
Generally , { TAIL ~ the order } in which { HEAD ~ the query terms } appear in the query is insignificant
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL REL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH