Yes, when searching through the Grin database you are able to search using keywords, hashtags, and usernames/handles. Keep in mind that the influencer must be in our system in order for them to appear in search.
Searching for an influencer using their username/handle without the "@" will pull up that influencer. If your search with the "@" included it will bring up influencers who have used that mention within their posts in the past.
If you would like more information on how to use the search feature within in Grin you can click here for a step-by-step guide & interactive walkthrough.