Невозможно найти некоторые пакеты [duplicate]

Я пытаюсь установить некоторые пакеты, но получаю сообщение об ошибке:

E: Unable to locate package libodbcinstq4–1 
E: Unable to locate package libodbcinstq4–1:i386
E: Unable to locate package libzthread-2.3–2
E: Couldn't find any package by glob 'libzthread-2.3–2'
E: Couldn't find any package by regex 'libzthread-2.3–2'

В качестве репозитория я добавил:

echo ‘deb http://cz.archive.ubuntu.com/ubuntu precise main universe’ >> /etc/apt/sources.list.d/extra.list

с ответом N0rbert я получил следующий результат:

libodbcinstq4-1 is already the newest version (2.3.0-4).
libodbcinstq4-1:i386 is already the newest version (2.3.0-4).
You might want to run 'apt-get -f install' to correct these:
The following packages have unmet dependencies:
 libodbcinstq4-1:i386 : Depends: odbcinst1debian2:i386 (>= 2.2.14p2) but it is not going to be installed
 libqtcore4 : Breaks: libqtcore4:i386 (!= 4:4.8.7+dfsg-5ubuntu2) but 4:4.8.5+git192-g085f851+dfsg-2ubuntu4.1 is to be installed
 libqtcore4:i386 : Breaks: libqtcore4 (!= 4:4.8.5+git192-g085f851+dfsg-2ubuntu4.1) but 4:4.8.7+dfsg-5ubuntu2 is to be installed
 libqtgui4:i386 : Depends: libqt4-declarative:i386 (= 4:4.8.7+dfsg-5ubuntu2) but it is not going to be installed
                  Depends: libqtcore4:i386 (= 4:4.8.7+dfsg-5ubuntu2) but 4:4.8.5+git192-g085f851+dfsg-2ubuntu4.1 is to be installed
                  Depends: libtiff5:i386 (>= 4.0.3) but it is not going to be installed
                  Depends: libxext6:i386 but it is not going to be installed
                  Depends: libxi6:i386 (>= 2:1.2.99.4) but it is not going to be installed
                  Depends: libxrender1:i386 but it is not going to be installed
                  Recommends: libcups2:i386 but it is not going to be installed
                  Recommends: qt-at-spi:i386 but it is not going to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

Я попробовал apt-get -f install, чтобы исправить проблему, но среди результатов я получил это сообщение об ошибке:

Errors were encountered while processing: /var/cache/apt/archives/libqtcore4_4%3a4.8.7+dfsg-5ubuntu2_i386.deb 
E: Sub-process /usr/bin/dpkg returned an error code (1)