Perhaps you should try some spelling variations:
estimates using » estimation using
states using » states during, rates using, studies using
wave small » waves small, live small, take small
ying yang » yang yang, yin yang, ying chang
yu yang » du yang, yi yang, yu fang
dea bei » der bei, drag bei

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ying yang) or (yu yang)) yang wave small ((states using) OR (estimates using)) dea bei ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ying yang) OR (yu yang)) yang wave small ((states using) OR (estimates using)) dea bei ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ying yang) or (yu yang)) yang wave small ((states using) OR (estimates using)) dea bei ;*".