Images are not import and is not show under Failed Image section

After Import finished.
The Failed Image section shows no error, I assumed all images should be imported successfully.

But following collections have lots of products does no have image, it just shows the default image.
http://wp.yyanime.com/collections/sword-art-online/
http://wp.yyanime.com/collections/tokyo-ghoul/

how can i re-import thoese images?