Perhaps you should try some spelling variations:
cadth optimal » path optimal, width optimal, health optimal
optimal laser » optical laser, optimal layer, optimal leader
dich optimal » sich optimal, durch optimal, nicht optimal
optimal use » optimal time
laser port » laser part, laser post, laser report
use report » use reports, user report, lse report

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: (( cadth optimal laser port ) OR ((( cadth optimal use report ) OR ( dich optimal use report )))).
• Adding a wildcard symbol may retrieve word variants: (( cadth optimal laser port ) or ((( cadth optimal use report ) or ( dich optimal use report ))))*.