Perhaps you should try some spelling variations:
tenth » benth, teeth, tench, texth, kenth, wenth
tenti » texti, kenti, wenti
tent » text, kent, went
tren » tres
test » text, west, best
problem » problema, problems, problemas
problemaas » problemaaas, problemsaas, problemasaas, problemas, problema, 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 OR tenti) OR ((tent OR (ten OR tren)) OR test)) (problem OR problemaas)~".
• Adding a wildcard symbol may retrieve word variants: Hilbert's ((tenth OR tenti) OR ((tent OR (ten OR tren)) OR test)) (problem OR problemaas)*.