"tenga" means "take it" or "have it" or it depends how you use it.. if you say "tenga el lapiz" your'e saying "take the pencil"
This looks like a badly translated sentence from English to Spanish, probably from the English: "Have a nice nap." But you would never say "que tenga una buena dormir," which literally means "may you have a nice sleep." More likely in Spanish you would say simply "Duerme bien" which means "Sleep well."
"Tengas" is second person singular subjunctive of "tener," meaning "have." in other words, the subject is "you," one person, and there is some aspect of hope or uncertainty about the sentence. Not a statement "you have such-and-such" but it could be "* hope you have...."
Espero que usted me puede ayudar - That's how you say 'I hope that you can help me' in Spanish.
Que usted tenga unas buenas noches
Eres estupendo. Que tenga una buena noche.
if you mean how do you say have a good Christmas, then its: tenga una buena Navidad
tenga un frío.
"Tenga" is the present subjunctive (1st and 3rd person) of the verb "tener". This is used to imply doubt or uncertainty in a statement. So..."tenga mucho" means someting like "you might have a lot".
Tenga un buen día
Haga lo que tenga que hacer.
I have = tengo Tenga Tengan Ten Tened ... ...
Que tenga un día dulce.
Tenga un feliz Ano nuevo
Que tenga un buen tiempo!
tenga cuidado de mi hermana
"Que tenga buenas vacaciones"
Si tenga una bebé bonita.