ne vous y trompez
"Ne te trompe pas"
You could say It was hard to deceive the teacher about that lie.
"sois toi-même"
Protégez-vous
if you want to you can- SURE you can XD
Amour vous-même
I'd probably say : "Courage !".
vous sont vous amusant?
I don't speak french but you could go on google translate and see for yourself. Hope this helped!
vous acheter un cadeau
She used a clever disguise to deceive her enemies and sneak into the enemy's fortress undetected.
ramène-toi à la maison
amuse-toi mon ami/amie