If I read the specification correctly, no.

You can match on an element, the name of an attribute in the element, and the value of a named attribute in an element. I don't see anything for matching content within an element, though.

CSS does not provide a selector for the nth element matching some complex selector. jQuery makes up for this with the :eq() selector:

$("#myId > li:nth-child(2) > a:eq(8)")

Note that :eq() is 0-indexed, unlike :nth-child() which is 1-indexed, so this will return the ninth element that matches the selector #myId > li:nth-child(2) > a.

The equivalent XPath, should you choose to use that instead, is:

(id('myId')/li[2]/a)[9]

Your situation is unique, however, because if we assume that #myId is unique, as it should be, then you can use the CSS pseudo-class :nth-of-type() to find the ninth a child of the second li child of the element #myId:

$("#myId > li:nth-child(2) > a:nth-of-type(9)")

Note that :nth-of-type() and :eq() are not the same. :nth-of-type() behaves much like :nth-child() in that it considers children of the same parent, except that it looks at the element type, or the tag name. In this case, the element type we're concerned with is a.

The use of > combinators in your existing selector implies a parent-child relationship between your li and a elements, which is compatible with the :nth-of-type() selector. This is why I believe it can be used in your specific situation.