can't unistall packages

["oski" <oski2001 hotmail com>]

Hi,
I can not unistall packages using rpm -e.
I get an answer like package not installed.
But I know are installed because if I do  rpm -qa | grep mipsel     I get:
mipsel-linux-gcc-
mipsel-linux-gcc-c++-
mipsel-linux-binutils-
Also I find the packages with   rpm -qa | more.
How can I unistall these packages when   rpm -e  do not find them?
Many thanks

oski