Hi,
There is no good solution for that.
You could use the operator "LIKE" and write %Jeans%
However, it will not match if there is not at least one character before and one after the word Jeans in the name.
And for several words, you could use %Jeans%Bridges% but this means that both words need to be in the name and in that same order and with characters before and after.
To have something more useful, it requires complex MySQL queries or PHP processing, like there is in the HikaShop products search plugin for example. And that's not possible with the options offered in mass actions.
Also, there is no OR logic with the mass action filters, only AND. So if you create two filters, both need to match for the product to be selected. I'm afraid you're touching the limits of what mass actions can do here.