Genius! That has worked on “brain”, thank you.
One thing I am still struggling on is results for “vitamin a” We do have one product with that in the title but it is not returned in the first page of results using the index table with or without inverted commas. In fact with inverted commas, it says: No results for “”vitamin a””, did you mean… vitamin a…?
With regular search enabled it does appear in the first page only when in inverted commas.
I suspect it may be related to the Minimum word length of 1 that I have set.