Perhaps you should try some spelling variations:
linear code » linear model, linear models
linear case » linear state, linear least
wang yang » wang yan, wang liang, wang yanling
dong skin » dong sin, dong bin, dof skin
brain a » brain _, brains _
train a » train _
yet a » et a, yet _, get a

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yang) or (dong skin)) yet a ((brain a) or (train a)) ((linear case) OR (linear code)) hai ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yang) OR (dong skin)) yet a ((brain a) OR (train a)) ((linear case) OR (linear code)) hai ;*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (dong skin)) yet a ((brain a) or (train a)) ((linear case) OR (linear code)) hai ;*".