義工不辭勞苦咁幫災民重建家園。
义工不辞劳苦咁帮灾民重建家园。
ji6 gung1 bat1 ci4 lou4 fu2 gam2 bong1 zoi1 man4 cung4 gin3 gaa1 jyun4. The volunteers spared no effort to rebuild homes for the victims.
Definitions (Wiktionary)
phrase, idiomatic
to spare no effort; to take pains; to take the trouble to; to go to the trouble of doing something