Perhaps you should try some spelling variations:
tenth » tenti, benth, tench, tentih, texth, testh
teeth » teets
beth » both, beta
tent » tenti, text, test
problem » problema, problemas
problems » problemas, problemass, problema
problemasa » problemaasa, problemasasa, problemas, problema, problemes

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