Win 8 Folder's search box doesn't work!

When i try to look for a file by folder's search box, although there is that file in this folder, win 8 doesn't give me any result.. no file matched! Please help me and sorry for my English..
search box doesn't work only in a folders that I have duplicated from an external ssd!

Tags: windows 8, ringtone free download, download games, free ringtones

Is Windows indexing service enabled? Have you manually run an index scan since copying the folder over?

To see the services press Winkey r, then type
services.msc
and hit Enter

scroll down and put the cursor on
Windows Search

it should show if it is enabled or disabled
also on top left of the Window if it says Start
then it is not running. Click Start to get it going.