贪求无厌

insatiably greedy (idiom)

to seek / to look for / to request / to demand / to beseech

not to have / no / none / not / to lack / un- / -less

(bound form) to loathe; to be fed up with / (literary) to satiate; to satisfy

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

to pursue greedily / to crave