You search by the brand name and find nothing: the problem is the word, not the catalogue
In a practice, things have their own names. They are asked for by brand, by habit, sometimes by an in-house nickname, and it works perfectly as long as the conversation is between people who know each other.
In a catalogue the situation changes, because the search engine matches what you type against the name the seller gave the product. If the two words do not coincide, the result is empty even when the product is there.
This happens more often on a marketplace than in a single shop, because the sellers are different businesses and each names its own articles its own way.
The first rule is to search with fewer words, not more. A long, specific search narrows too far and finds nothing; a search of one or two words finds too much, and you filter from there.
The second is to use the generic name of the product rather than the brand name. The descriptive term almost always appears in the title, whereas a brand name appears only in that brand's products.
The third is to try singular and plural. It sounds trivial and it accounts for a sizeable share of empty searches, because the matching is textual.
The fourth is to drop the specifications. If you search for the size, the colour and the pack all at once, one of the three being written differently is enough to wipe out the results: better to search for the product and then look at the variants available.
The fifth is to move to the categories when text search is not helping. Browsing a category is slower but shows things you would not have searched for, and in a catalogue you do not yet know it is often the more efficient route.
The reverse is also true, that is, using search as a tool for discovery rather than only retrieval. Searching the generic term for a category you use every day shows which sellers cover it and at what prices.
One final practical point: if you search for something and do not find it, that does not mean it is missing. Before concluding the catalogue does not have it, it is worth trying at least two different phrasings.
And if it genuinely is not there, that is useful information for the platform. A catalogue also grows on the basis of what people look for and fail to find.
An empty search, then, is not always a failure. Sometimes it is how a product arrives in the catalogue a few months later.
In summary: search matches your text against the name given by the seller, fewer words work better than more, the generic term beats the brand name, singular and plural give different results, and browsing categories is the best way to get to know a new catalogue.