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