"We are looking for the map, because we do not want to get lost."
Translation:Etsimme karttaa, koska emme halua eksyä.
Hi! I think that despite the name, partitive does not always refer to a part of something. As in English you use the for preposition together with to look, in Finnish you generally use partitive with the verb "etsiä". Here is a list of verbs that require partitive https://uusikielemme.fi/finnish-grammar/grammatical-cases/partitive-verbs-partitiiviverbit-list/