Perhaps you should try some spelling variations:
treaty linear » treaty idea
change model » change models, cge model, stage model
model treaty » model test, model tests, model theory
linear plot » line plot, linear flow, linear logit
lung can » hung cam
cong sun » cong shu, cong van, wing sun
hong yu » wong yue
wang » wing, wan

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: ((lung can) OR (cong sun)) change model treaty linear plot (((wang OR lang) zhi) OR (hong yu)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lung can) or (cong sun)) change model treaty linear plot (((wang OR lang) zhi) or (hong yu)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((lung can) or (cong sun)) change model treaty linear plot (((wang OR lang) zhi) or (hong yu)) ;*.