Perhaps you should try some spelling variations:
book titless » book title, book tables, work titles
works titles » work titles, works title, work title
ebook title » book title
book titles » book entitled, book intitled

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: nijhoff ((((((book titless) OR (works titles))) OR (ebook title))) OR (book titles)).
• Adding a wildcard symbol may retrieve word variants: nijhoff ((((((book titless) or (works titles))) or (ebook title))) or (book titles))*.