Perhaps you should try some spelling variations:
thinking losing » thinking long, thinking using, thinking leading
47 abstract » 4 abstract, 4.1 abstract, 4.0 abstract
yan yang » yang yang, yao yang, dan yang
sie sich » die sich, wie sich, die sicht
yang 47 » yang 4, yang 4.3
wang » wing, wan, lang
und » fund
ein » eine

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 yang 47 abstract thinking losing ((sie sich) or (und ein)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yan yang 47 abstract thinking losing ((sie sich) OR (und ein)) ;*.