Leaning in signals that you want to kiss the person, and tilting your head prevents you crushing your nose against the other person's. Don't try to thrust your tongue into your partner's mouth right away.  Simply press your lips against theirs. Close your eyes as you do to heighten the intimacy and to avoid looking at the pores on your partner's nose. Imagine your eyes are being controlled by a dimmer switch. Kiss your partner once, slowly, letting it last for a few seconds. Then slowly draw your lips away, keeping them close enough to your partner's lips so that they are almost touching (but aren't). This lingering will help build the passion, and will really capture your partner's full attention (pfft, as if you didn't have it already). Once the kiss is accepted, try opening your lips slightly. If the other person follows suit, try slightly varying the openness of your lips (both more and less open) throughout the kiss. You may wish to explore the person's lips and tongue a bit with the tip of your tongue. There are no rules; just try to make your motions smooth. Keep in mind that there is a thin line between passionate kissing and a drool fest. In order to gauge how wet your kisses should be, kiss the back of your hand like you would if you were kissing your partner and opening your lips slightly. You should leave a slight amount of moisture that dries up in a few seconds. If you see more than this, or leave a big wet circle on your hand, you've overdone it--dial it back. As the kiss progresses, you may want to try French kissing, in which you insert your tongue lightly into your partner's mouth and let it dance with your partner's tongue.

How would you rephrase that briefly using Vietnamese?
Ngả người và hơi nghiêng đầu. Bắt đầu từ từ. Hãy nấn ná giữa các nụ hôn. Hơi hé mở môi. Thử áp dụng nụ hôn kiểu Pháp.