Acacia is a genus of scrubs and trees that includes Koa (Hawaii), Mimosa (SE USA), Wattle (Australia) etc. There are roughly 1300 species of Acacia around the world.
The Acacia that grows in Israel and surrounding areas is commonly known as ****tim or ****tah. You might have better luck searching using one of these more common names.
EDIT: (LOL) I just posted and noticed the "profanity filter" does not like the tree names. The names are spelled: S H I T T I M and S H I T T A H.