The trick with Vinted is you need to save the brand, and then base for search from there. Often the only way to save the brand though, is to find an existing listing and click on the brand name there, as otherwise Vinted sometimes won't recognise it (it's a pretty shambolic search system they have). After that, it's a case of putting in terms you think the general public will use to describe the item you're after. I was after a Marmot Driclime Ether, but knowing that a lot of people have no idea what they own and the fact that Marmot like Montane write absolutely nothing useful in the labels (why?!), had to search within the Marmot brand for things like 'fleece', 'jacket' etc. eventually found one but only after looking at a lot of listings and seeing if the garment had the exact features I knew were on the version I wanted.
It's also worth asking naïvely what they use to wash the clothes. If it's a piece of technical clothing and they say anything about fabric softener, you know they have zero clue and that the garment is probably wrecked.
Yes also a bit of a Vinted expert (addict) just to add, once you’ve found your brand, you can set some other filters, such as condition, (New with tags, very good, etc) and also importantly sizing and budget. This can filter out a lot of the stuff you’re not interested in. Then it is a bit about patience and waiting for what you’re looking for to turn up. I got quite a nice Pendleton wool shirt, this way and have current searches for a hood (hoodie simplified for its rubbishy search technology) and fleece. If you’re lucky and they recognise them, you can include a few brands in your search.
If you’re unconcerned about brand, then I’d suggest using other filters to try and narrow down the field of search. If you’re getting 99 new items under your search each day it’s not narrow enough.