The article analyzes the system of focus-sensitive particles and, to a lesser extent, clefts in Vietnamese. EVEN/ALSO/ONLY foci are discussed across syntactic categories, and Vietnamese is found to organize its system of focus-sensitive particles along three dimensions of classification: (i) EVEN vs. ALSO vs. ONLY; (ii) particles c-commanding foci vs. particles c-commanding backgrounds; (iii) adverbial focus-sensitive particles vs. particles c-commanding argument foci only. Towards the end of the paper, free-choice constructions and additional sentence-final particles conveying ONLY and ALSO semantics are briefly discussed. The peculiar Vietnamese system reflects core properties of the analogous empirical domain in Chinese, a known source of borrowings into Vietnamese over the millennia.