Moving apps to the card is a little different than moving files. Some apps won''t work if run from the card (no widget will), and if the developer knows what he's doing, and his app won't run from the card, he won't allow it to be moved to the card. (To keep from having to answer all the "I moved your app to my SD card and it stopped working" emails - even though it says, right on the app's page, that it won't run from the card.)
Also, some of the newer phones just don't support moving apps to the SD card, so you just can't on that phone (or tablet). The only way to defeat that is with a custom ROM that allows moving apps. (Since it seems that this is one of those no-name Chinese devices, information about it is about as easy to find as finding a flying elephant, and the odds of finding a custom ROM for it aren't much better.)