When using the keyword search use a single keyword such as dentist or events or pharmacy. If pharmacy doesn’t work try the plural – pharmacies. Multiple words are too complex for the search engine in many cases.
Import/Export are not a part of the NAICS System. If you import or export you are most likely a Merchant Wholesaler.
If you sell commercial products you are a wholesaler even if you think you are a retailer. i.e. If you retail medical supplies or heavy equipment you are actually considered a wholesaler in the NAICS System.
For any type of rental, use the word “rental” in the keyword search and then look through the results for the correct one. Same for repair.
If you are an event planning company search on the term event.