You can search for item names and item stats.

Search for any item with a stat, e.g. "Frostaura".

Search value of stats, e.g. "Reflection: 50".

Search for ranges of stats, e.g. "Defence: 5+", "Critical Chance: 15-", "Looting: 30-40".

Use a vertical bar (aka pipe) to search for items with at least one of multiple terms, e.g. "Sharpshooter's Bow | Woodshot".

If you search with more than one search term, separate the terms with a comma.