There are four different search "categories". Standard is "keywords" - then there are "users", "titles" and "Yahoo" in the drop-down menu.
If you used the preset "keywords", this thread will not show, because no one has added "naked" and "woman" to the keyword list right below the article post up top.
I always use the "titles" search with one or two descriptive terms from the article title.
This thread will turn up in the search then. I don't know why "keywords" is the preset standard, because that is, in fact, pretty useless most of the time.
I used the title search at first.