You can also type both tags into the search bar above. Make sure to separate them with + to add another tag to your query (or - to filter a tag out).
https://www.fakku.net/search/chubby+glasses.
Unfortunately there isn't a huge selection of this tag combination, yet... Also don't forget that hentai is rather offbeat to begin with. If she isn't already familiar with the subgenres, she may just find something new and exciting altogether. It might easier for us to help you if you could find out what types of scenarios are interesting to her. There's all sorts of stuff on this site from femdom, to monstergirl, to exhibitionism. Well, you probably already knew that.