Perhaps you should try some spelling variations:
scale learning » safe learning, face learning, local learning
help scale » helps scale, help small, help state
yang yang » wang yang, wang yan
wang help » can help, wang he
yin yang » ying yang, yi yang, yin fang
drag bei » drag abed, tag bei
dea bei » der bei

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang yang) or (yin yang)) wang help scale learning during ((dea bei) OR (drag bei)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang yang) OR (yin yang)) wang help scale learning during ((dea bei) OR (drag bei)) ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((yang yang) or (yin yang)) wang help scale learning during ((dea bei) OR (drag bei)) ;*".