"Cảm ơn sự ủng hộ của bạn."

Translation: Thank you for your support!

[KflHZ]

Where is the 'for' in this sentence or are we to assume it's implied? If so, is there going to be another way Duolingo will sang this in Vietnamese in a later lesson?

[IanCarroll11]

Where is the ...FOR...???

[JPark2000]

The sentence structure in Vietnamese doesn't require a separate word to mean "thank you FOR," but rather it's implied.