Since I don't know Malay, I'll explain a bit in English. 

Hajimemashite

Watashi wa syahira desu.
Betonamu Malaysia kimashita.

*Are you from Viet Num? Or Malaysia? 

By the way, "~kara kimashita" means "I came from Malaysia = I'm in the other country now". We use "(place) shusshin desu" and it means "I was born in (place)". Or you can also say "watashi wa Malasya ni sunde imasu" = I live in Malasya. 

Yoroshiku onegai shimasu.

Good job! I hope this helps you.