Irena, what others have been telling you is; even though there are 28,241,770 profiles on WikiTree it doesn't mean that your particular family has already been created on WikiTree. If you are looking for currently unknown family to connect with you may need to look on other genealogy websites.
If living relatives, such as sister, brother, father, mother, aunts, uncles, cousins have been entered here by someone else you will not find them on a search because they are living and their personal information must be private. You will also not find them on other websites.
Just for interest I looked on Family Search for people with some of the last names you have contributed here, the website is free to use, you do have to sign up.
Šmid has 74,253 entries in their family tree, Marolt has 5,825 and Vovk has 26,202.
https://www.familysearch.org
Ancestry has over 200,000 for Šmid, 45,361 for Marolt and 4005 results for Vovk, you will need to join and pay for Ancestry unless you use a free trial and cancel the account at the end of the trial period.
You can contact the people who have created trees on both Family Search and Ancestry, whether they will reply is another question entirely.