It looks like you're looking for information on a specific piece, possibly a manga or anime titled "NTR-d By Clumsiness" with a Vietnamese title that translates to "Tai xuong mien phi" or "Free Download".
However, I need to clarify that "NTR" is an abbreviation for "Netorare," a genre of anime and manga that involves themes of cuckoldry, infidelity, and often, humiliation. This genre can be quite mature and not suitable for all audiences. NTR-d By Clumsiness Tai xuong mien phi