Perhaps you should try some spelling variations:
"Hilbert's tent problems" » "Hilbert's en problemas", "Hilbert's current problems"
"Hilbert's tenth problems" » "Hilbert's tenti problems", "Hilbert's teeth problems", "Hilbert's tench problems"
"Hilbert's benth problems" » "Hilbert's beth problems", "Hilbert's bento problems", "Hilbert's bench problems"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("Hilbert's tenth problems") OR ("Hilbert's benth problems"))) OR ("Hilbert's tent problems"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"Hilbert's tenth problems\") OR (\"Hilbert's benth problems\"))) OR (\"Hilbert's tent problems\"))".
• Removing quotes may allow a broader search: (((( Hilbert's tenth problems ) OR ( Hilbert's benth problems ))) OR ( Hilbert's tent problems )).
• Adding a wildcard symbol may retrieve word variants: (((("Hilbert's tenth problems") OR ("Hilbert's benth problems"))) OR ("Hilbert's tent problems"))*.