> (http://www.mypda.com.vn/shop/man_acer_12---DESC-pro
> duct_price-start-0-limit-10/),
> its content was not saved into (new)cache.zip.

The cache is internal to Httrack you want the files.
Look at the log and you'll see that <http://www.mypda.com.vn/robots.txt> must be
overridden.