Boss: which search to use?

For each question, pick the search that answers it best.

The manuals use technical terms such as “descale”.

The Librarian's final test: keyword, meaning, or both? 📚

The user types the exact code “E-42”.

The user asks for “valve V-7”.

The user says: “the machine blinks and stops”.

They write “refund”; the text says “money back”.

They mention “X200” and ask how to “remove limescale”.

They cite “E-42” and describe the fault in other words.