Hi, I tried many times by just copying my pin's title and using key words, but I can't find any of pins from all the results, who knows what's going on? My account is ok to create new pin, but there is a few traffic.
Pinterest takes time to fetch your pins in order for it to show in search. It's not an overnight success. The key is to check your analytics once a month. In addition, make sure you're using Pinterest's best practices by injecting your keywords in the right places. If no one engages with your content they will not show up high in search either.