Sorry I don't know where to put this question.

I read a lot of scientific papers which used the word "robust" when mentioning results.
For ex: The ordering of drug classes in terms of risk of discontinuation was consistent despite methods of analysis, thus supporting the robust nature of the drug-class comparision results.
Could you explain the meaning of "robust" for me more clearly? I have looked it up in dictionary but still can't figure it out.
Also, which Vietnamese words have the coresponding meaning?