Perhaps you should try some spelling variations:
estimates using » estimation using
states using » states during, rates using, studies using
yang jie » yang jin, yang di, yang jui
deep bei » deep sea, deep box, deep bp
yu yang » du yang, yi yang, yu fang
jie art » die art, fine art, eine art
wang » wing, wan, lang

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: ((wang yan) OR (yu yang)) yang jie art ((states using) OR (estimates using)) deep bei ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yan) or (yu yang)) yang jie art ((states using) OR (estimates using)) deep bei ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yan) or (yu yang)) yang jie art ((states using) OR (estimates using)) deep bei ;*.