According to a search translate page, "tu dien" is detected as being from the Afrikaans language. It roughly translates to "to apply". Without a complete sentence it is difficult to put the phrase into context.
"And you."
Translation: You want
I miss you
you
"tu" is not a valid Japanese syllable and therefore, could have no translation as it has no meaning in Japanese.
The most common translation of "tu perro" is "your dog."
how are you
"Excuse me, you are...?"
"Tu reviens quand?" means "When will you return?"
tu = you comer = to eat pescado = fish
"tu sais Maman" means "Mum, you know"
Translation: tu abuelo