in SearchSetup.jspf make the default value of searchType = 1001 instead of 1000
<c:set var="searchType" value="1001" scope="request"/>
below is the explanation - also you can find complete list in same file :
13. ANY | 1000 | INCLUDE products, kits, bundles, category level SKUs
| (Default) | EXCLUDE product level SKUs
| |
14. EXACT | 1001 | INCLUDE products, kits, bundles, category level SKUs
| | EXCLUDE product level SKUs
| |
15. ALL | 1002 | INCLUDE products, kits, bundles, category level SKUs
| | EXCLUDE product level SKUs
EXACT will force solr to match the whole sentence , same as when you type your search term in inte qoute "search term" , that will search in products that have EXACT sentence in product name , short description , category name , SEO Keywords , name override and description override
Hope this answer you question.
Thanks
Abed