How to rank website for title ?

Hi guys.
I need your help.
I'm buying domains from auction for my PBN, i need them to rank first position by their titles(if search their title in google).
They have longtail titles and they were on 1st position for title some time ago. But now, are gone.
With dropped domains - i didnt face with such problem, they are on first position for the title every time i need it.
How to fix this problem?

so you mean you ranked your site on 1st position with the keyword on your title?
Checklist:
1)Have you been building links recently?
2)Do you install any plugins on your site(wordpress) which cause your site "noindex"? (P.S i experienced this before)
3)Go to webmaster tool > yourdomain> manual actions (See if your site got penalized)

If that domains doesn't havy any filter just put good content related to title on it and made some fresh links, it will be back soon for long tail keywords

Cause it is PBN i don't add websites to WMT, about link - do it already. Using good quality Web 2.0s, but this doesn't give good effect.

The title is also a search term and it would depend upon competition. The longer the title, the more competitors will appear ranking for various combinations of the title. If their domains are stronger then yours, they will obviously outrank you. So improve your domain authority without spamming anchors and you will rank with time.