From Wiktionary, the free dictionary
Sino-Vietnamese word from 學 (“to learn”) and 行 (“to do”).
học hành
- to learn or study thoroughly, without forgetting to apply theory to practice
- to do learning or studying
Học hành chẳng đâu vào đâu!- Your schoolwork is terrible!
- (literally, “[The way] you're doing your schoolwork is terrible!”)