Perhaps you should try some spelling variations:
"Hilbert's tenti problem" » "Hilbert's texti problem", "Hilbert's testi problem", "Hilbert's kenti problem"
"Hilbert's tent problem" » "Hilbert's text problem", "Hilbert's test problem", "Hilbert's kent problem"
"Hilbert's benth problem" » "Hilbert's beth problem", "Hilbert's bento problem", "Hilbert's bench problem"

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