Perhaps you should try some spelling variations:
opto-rhino-laryngology" » otto-rhino-laryngology", onto-rhino-laryngology", opto-rhine-laryngology", opto-reino-laryngology"
opt-reine-otolaryngology" » opt-reiner-otolaryngology", opt-seine-otolaryngology", opt-reihe-otolaryngology"

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: "(advances OR advanced) in (opto-rhino-laryngology" or opt-reine-otolaryngology").
• Removing quotes may allow a broader search: (advances or advanced) in (opto-rhino-laryngology or opt-reine-otolaryngology ).
• Adding a wildcard symbol may retrieve word variants: "(advances or advanced) in (opto-rhino-laryngology" or opt-reine-otolaryngology")*.