I am looking for my daughter, her mom name is Edith Schneider, she married and his last name is brunner, Last know to live in Kaiserslautern Germany. She was born in June 1979. I lost contact with them in 1988. I have tried Facebook to no avail.

Sadly there's really no one on this site, that I know of, that can help you with this. Your best bet, if Facebook led you nowhere, is to hire a private investigator.

My brother took the Ancestry genetic test & without trying, ended up locating a half-sister of ours and an uncle's genetic grandson. I'd try those kinds of things.

(We did not know of their existence--were not even looking.)

Put a notice in the paper in Germany, if it's not too big a town.
Provide more details such as dates.
Schneider and Brunner are much much too common names.