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 problems" » "Hilbert's teets 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.

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