Perhaps you should try some spelling variations:
practice text » practice time
things change » things chapter
men teaching » open teaching, modern teaching, does teaching
hard things » hard thing, bad things, smart things
text hard » text part, text art
dort ii » dort bin, dort hin

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: men teaching practice text hard things change ((((dort ii) OR (dong sin))) OR (dong di)) ;~.
• Adding a wildcard symbol may retrieve word variants: men teaching practice text hard things change ((((dort ii) or (dong sin))) or (dong di)) ;*.