xin dấu tên 
to request anonymity, that one’s name not be used [ xin ] : to ask for, request, beg; please
[ dấu ] : mark, sign, signal, (tone) mark, stamp, track, print, trace, tone, seal
[ tên ] : (1) name; named; (2) [CL for spies, robbers]; (3) arrow
Most Common Compounds Set 1:
Most Common Compounds Set 2 :