Perhaps you should try some spelling variations:
when learning » open learning, between learning
learning hit » learning how, learning has, learning habits
debt when » debt we, debt what
dong cao » dong xiao, dan cao, dong nan
dong bin » dong di, dann bin
hit 5 » hit _, fit 5, hin 5
ye a » yet a, e a, me a
y a » y la

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((((dong cao) or (dong sin))) or (dong bin)) ((y a) or (ye a)) debt when learning hit 5 ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((dong cao) OR (dong sin))) OR (dong bin)) ((y a) OR (ye a)) debt when learning hit 5 ;.
• Adding a wildcard symbol may retrieve word variants: ((((dong cao) or (dong sin))) or (dong bin)) ((y a) or (ye a)) debt when learning hit 5 ;*.