Perhaps you should try some spelling variations:
"optician and scientific content maker" » "optician and scientific context maker", "optician and scientific concepts maker", "optician and scientific control maker", "optician and scientific content market", "optician and scientific content mike", "optician and scientific content matters"
"optician and scientific concept maker" » "optician and scientific concepts maker", "optician and scientific context maker", "optician and scientific congress maker", "optician and scientific concept cancer", "optician and scientific concept based", "optician and scientific concept maps"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("optician and scientific content maker") or ("optician and scientific concept maker"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("optician and scientific content maker") OR ("optician and scientific concept maker")).
• Removing quotes may allow a broader search: (( optician and scientific content maker ) or ( optician and scientific concept maker )).
• Adding a wildcard symbol may retrieve word variants: (("optician and scientific content maker") or ("optician and scientific concept maker"))*.