Perhaps you should try some spelling variations:
teni » tenia, tenis, tenir
tent » text, kent, ten
tenti » texti, kenti, teni
test » text, west, best
problem » problema, problemas
problems » problemas, problemass, problema
problemaaes » problemaaaes, problemasaaes, problemas, problemes, problematizes

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 ((teni OR teni) OR ((tent OR tenti) OR test)) ((problem OR problems) OR problemaaes)~".
• Adding a wildcard symbol may retrieve word variants: Hilbert's ((teni OR teni) OR ((tent OR tenti) OR test)) ((problem OR problems) OR problemaaes)*.