OR, AND search
By default plugin use OR search logic. This means that when you search, for example, for Red t-shirt you will see in search results all products that has at least one of this words in its content.
But this behavior can be changed with help of Search logic option from plugin settings page.
Search logic option
By switching to AND search logic in the example above you will see in search results only products that contains both search words.
Partial, Exact match
Partial match means that the search results will include products containing words that match only part of the search term. For example, with the search query cap, products with the word capacity will be displayed.
However, this behavior can be changed. When the Exact search option is enabled, the search results will include only products that have exactly the same search term.
Exact search option