Finally, I found a HACK! I had write a blog post about this hack, you can find more details here(written in Chinese).
For your convenience, I translated the key steps to english and put it here:
Edit ~/Library/Preferences/com.apple.spotlight.plist (You may need to install Xcode, because this is a binary plist, or you can download a modified file in the post above)
Within orderedItems node, add a Dictionary item, key-values is:
enabled: YES (boolean), name: “MENU_DEFINITION” (string)
Save the plist file
Open System Preferences -> Spotlight, you will find a blank entry, this is what we had added above. You can drag it like other entries to change the order as you like
You are done!
Now try type a word in spotlight and see what happened.
Sorry I can't post images....You can click to see the screenshot
