Perhaps you should try some spelling variations:
test strain » stress strain, test straight
test strip » test strips
dong skin » dong sin, dof skin
dong bin » dong sin, dong di, dann bin
thi hong » tan hong
hong ghi » zhong zhi, hong g, hong hai
wang » wing, wan, lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang yan) or (((dong bin) or (dong skin)))) ya hua ((test strain) OR (test strip)) thi hong ghi ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang yan) OR (((dong bin) OR (dong skin)))) ya hua ((test strain) OR (test strip)) thi hong ghi ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yan) or (((dong bin) or (dong skin)))) ya hua ((test strain) OR (test strip)) thi hong ghi ;".
• Adding a wildcard symbol may retrieve word variants: ((wang yan) or (((dong bin) or (dong skin)))) ya hua ((test strain) OR (test strip)) thi hong ghi ;*.