Hello Julia^^

Except for the first two sentences, you did well in telling us what you plan to do on your winter vacation. I hope you have a good trip to Vietnam. ^^

~Charlie

Sam, dan was doing very well?
Dan was so cute.

*** I'm not exactly sure how these sentences relate to you going on a trip or what you mean by using them so I cannot correct them... >.<

I'm going on a trip this month to Vietnam before the end of this year.
>> I'm on going to Vietnam this month.

>> OR: I'm going to Vietnam before the year ends.

Could you recommend one notable destinations?

>> Can anyone recommend a notable destination?

>> OR: Can anyone suggest a good place to go?