Some of my articles have for example the word "vídeo". But if I search for "vídeo" it doesn´t find them. If I search for "video" it does find them. Idealy, it should find the articles either way. But if I have to choose, it would be better to find the exact match. 

This is VERY IMPORTANT for usability, because my clients need to be able to find articles, otherwise there is no purpose for investing so much time creating articles.