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

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