How can I search for an account by any of the words in the name when creating an opportunity?

Sales in the Redwood user experience provides you with the fastest way of searching using any of the words in an account name when you're creating an opportunity. Just place your cursor in the Account field to see the most frequently used accounts. If the suggestions don’t match what you’re looking for, enter any of the words in the name. You can also search for the account using the contact name, city, or other related information. You can also search by a combination of attributes, such as a word in the name and the city where the account is located.

If you're creating an opportunity in the classic Sales UI, you must click Search in the Account field drop-down list and then select the contains operator for the account name to be able to search by any of the words in the account name.