When you are searching for Regulatory information through the "Regulatory Guides" service, the double quotation marks "" around your keywords would help to return the exact match.
For example, to search for any Regulatory guides related to personal protective equipment. Please find the recommended double quote search feature (with steps) below:
(1) Check in the area (1) and make sure your settings are preferred;
(2) In the search box (2), please search for:
"personal protective equipment"
then the system would only return the exact matches.