giúp mình với ạ

Based on the IPA notation, I would suggest that the correct spelling for the first word is "vacation". As for the second word, I think the correct spelling is "Bangkok", not "aangkok". "Bangkok" is the capital city of Thailand. So, the corrected sentence would be: "We went on vacation to Bangkok last year." The word that is different is "vaacation" (which should be "vacation") and "aangkok" (which should be "Bangkok").