multiple match with a fuzzy search

[Please help me]

hi all good people

i have a spreadsheet with over 27000 rows of data and 11000+rows of reference data
My reference data all unique, however some of the cells have a string that is similar for example
c/dog/001/01, c/dog/001/02, c/dog/001/03, c/dog/002/01, c/cat/001/01, c/cat/001/02, c/cat/002/01.

the 27000 rows have a blank row between changes in values.

What i have been asked to do is look at my master reference and return all values that could come under that reference in the ref data, so in my examples above it return all dog references under the first line of my master data rows and then subsequently on the next master line have the next set of values

would this be possible with either an advanced formula or VBA

i hope i have explained this sufficiently

 

[sijpie]

Not very clear on what youwant as output. With the example of cats & dogs of your input table, what would the output look like?
Why can't you simply use a filter or pivottable?