Perhaps you should try some spelling variations:
fortra » fortran, fortral, fortranm
fortrand » fortrannd, fortralnd, fortranmnd, fortran, forcrand, fortland
fortrandl » fortranndl, fortralndl, fortranmndl, fortranl, forcrandl, fortlandl, fortran, fortland, fortral
vortra » vortrage, vortrags, vortragt
vortrag » vortrageg, vortragsg, vortragtg, vortrage

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((fortra OR (vortra OR vortrag)) OR (fortrand OR fortrandl)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((fortra or (vortra OR vortrag)) or (fortrand or fortrandl))".
• Adding a wildcard symbol may retrieve word variants: ((fortra or (vortra OR vortrag)) or (fortrand or fortrandl))*.