Perhaps you should try some spelling variations:
tenth » benth, teeth, tench, texth, kenth, tenh
kenth » keneth, keith, kent
tenti » texti, kenti, teni
tent » text, kent, ten
test » text, west, best
problem » problema, problems, problemas
problemsas » problemasas, problemssas, problemassas, 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 kenth) OR tenti) OR (tent OR test)) (problem OR (problemsas OR problemsas))~".
• Adding a wildcard symbol may retrieve word variants: Hilbert's (((tenth OR kenth) OR tenti) OR (tent OR test)) (problem OR (problemsas OR problemsas))*.