Perhaps you should try some spelling variations:
alten » alter
aller » allem
allen » alle
vallex » valleix, valles, vallet
alterx » altere, altern, altera
alterrn » alteren, altern, alteran
alterna » alternate, alternans

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: ( (alten OR (aller OR allen)) OR ( ((vallex OR (vallee OR valley)) OR (alterx OR alterrn)) OR alterna )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "( (alten or (aller or allen)) or ( ((vallex or (vallee OR valley)) or (alterx or alterrn)) or alterna ))".
• Adding a wildcard symbol may retrieve word variants: ( (alten or (aller or allen)) or ( ((vallex or (vallee OR valley)) or (alterx or alterrn)) or alterna ))*.