Perhaps you should try some spelling variations:
managing changes » managing channel, making changes, management changes
boost bring » boost during, best bring
can boost » a boost, can best
bring ong » bring out
chang gui » chang jui, chang su, chang yun
chae yuan » chae yun, chiao yuan, chu yuan

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: hoang ((managing changes) OR (managing change)) can boost bring ong ((chang gui) OR (chae yuan)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoang ((managing changes) OR (managing change)) can boost bring ong ((chang gui) or (chae yuan)) ;~".
• Adding a wildcard symbol may retrieve word variants: hoang ((managing changes) OR (managing change)) can boost bring ong ((chang gui) or (chae yuan)) ;*.