To get more relevant results, use quotation marks to force the database to find an exact phrase, as in this search:
"supply chain" AND "Red Bull""
Be careful about using phrase searching; it is not always to your advantage. In the example above, putting quotes around supply chain might eliminate articles where authors use these phrases instead: suppliers, supplied, suppling, etc.
Or, suppose your search is this:
supply chain AND "Red Bull energy drink"
If you force a database to retrieve the phrase "Red Bull Energy Drink" then you might miss articles where authors simply refer to the product as Red Bull.
Experiment with your searches to see what works best.