make one’s way, find one’s way in, worm (oneself) into ☊ 
len chân ☊ kind of very small worm living in water ☊ sa trùng ☊ (1) worm (2) deep, profound ☊
sâu ☊ artemesia, worm wood ☊ thanh hao ☊ even a worm will turn ☊ tức nước vỡ bờ ☊