I don't know if its my PS only (PS 1.7.6.4), but search results are not filtered by reference number. If I have a product with 10 combinations for example:
C100-00 -> default combination
C100-01, C100-02, C100-03 ....etc. are other combinations. If I search for the combination C100-03, the search result brings me the default C100-00 combination option (links to default combination). That may be confusing for customers. I'd like to know if you have this problem solved.
Best regards!