贪小失大

penny wise and pound foolish (idiom)

to have a voracious desire for / to covet / greedy / corrupt

small / tiny / few / young

to lose / to miss / to fail

see 大夫[dai4 fu5]

big; large; great / older (than another person) / eldest (as in 大姐[da4 jie3]) / greatly; freely; fully / (dialect) father / (dialect) uncle (father's brother)