探してたの

was looking for

→ 探す
phrase Rare #28,545
was looking for A casual contraction of 探していたの. The final の can add an explanatory or emphatic tone; with rising intonation, the phrase can ask “Were you looking for…?”
JA: ずっと探してたの。
EN: I’ve been looking for it this whole time.

これね、ずっと探してたの。

This is what I've been looking for all this time.

探してたのよ

I was looking for you.

— 紅夢 (1991)

それは…探してたの

That's what... I've been looking for.

— ふたりのベロニカ (1991)

何を探してたの?

What were you looking for?

トムを探してたの?

Were you looking for Tom?

私を探してたの?

Were you looking for me?