From Wiktionary, the free dictionary
rướn • (摪)
- to stretch, to lengthen
1978, Chu Lai, chapter 5, in Nắng đồng bằng, NXB Quân đội Nhân dân:Nhảy một bước tới người ấy, dù rướn chân, Sáu Hoá cũng chỉ đứng tới cổ.- In one jump he was near that person; however much he stretched his legs, Six Hoá was only as tall as the other person's neck.