thu từng bước 
to record one’s every step [ thu ] : (1) autumn; (2) to collect, gather, take in, record
[ từng ] : (1) (present perfect marker); (2) each, one by one, every; (3) layer, level, step; (4) to experience; (5) by, for; (6) [CL counter for units of floors of stories], layer, story (of a building)
[ bước ] : to step, stride. walk
Most Common Compounds Set 1:
Most Common Compounds Set 2 :