Hello
Since your question is about your upcoming trip, I decided to focus on the horizontal rows and not so much with the past-present-future part.
Row 1 - Outside of control
House-Bouquet.-Snake
I am taking the house to be your hotel or other accomodations you will have.
The Bouquet indicates they will be very nice, but the snake makes me think that you should pay careful attention to the bill to avoid possible overcharges. However, if it isn't a really big overcharge, you should probably let it go. The snake could also indicate a problem with cleanliness or hygiene of the place so be cautious about hand-washing and such.
Row 2 - Movement of situation
Ring -Tree- Cloud
In all honesty this row has me a little worried. The Ring card can stand for illness and since it is next to the Tree card (health) which is next to the Clouds, this row seems to indicate possible health issues. (see next row)
Row 3 - Within control
Moon - Scythe - Mice
This row is the good news which is that you are in control.
I see the Moon as you and you being very in control. The Scythe and Mice indicate something "eating" at you, something bothering you. This could be a problem, or it may relate to the previous row.
My general advice for you would be to be very careful about what you eat. I know the food in Bangkok is wonderful, but it only takes one bad thing to cause a problem so just be aware and if you get the idea some food may be unclean or whatever, just skip it and you'll be fine.
Otherwise I see no big problems arising so things should go smoothly for you.
I find when I read Lenormand I really do tend to see trouble. This is something I have to work on, I need to read it more often and check my results.
I wish you a wonderful and safe trip.