Perhaps you should try some spelling variations:
tenth » tenti, teeth, tench, tentih, texth, testh
benth » beth, bento, bentr, bength, brenth, beneth
bent » bengt, brent, benet
bench » berch, beach, bunch
tent » tenti, text, test
problem » problema, problemas
problems » problemas, problemass, 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 OR kenji) OR ((benth OR bent) OR bench)) OR tent) (problem OR problems)~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "Hilbert's (((tenth OR kenji) OR ((benth OR bent) OR bench)) OR tent) (problem OR problems)".
• Adding a wildcard symbol may retrieve word variants: Hilbert's (((tenth OR kenji) OR ((benth OR bent) OR bench)) OR tent) (problem OR problems)*.