The search feature has a tendency to match full words first. If you only type part of the word and press enter, it will move to the first match and thus the RtK1 keyword.

This would be a good time to remind Fabrice to add all RTK3 2nd ed. keyword changes. It's almost half a year now since 2265 is spelled "devote", not "dedicate". Alternatively, on Firefox, install the script, which even allows you to select a single edition for each book.