Perhaps you should try some spelling variations:
ansatzes jing » ansatzes einer, ansatzes im, ansatzes von
des ansatzes » des einsatzes, des datensatzes, des gesetzes
yang guang » yang yang, yang liang
zhong tai » hong tan, hong hai, zhong zhi
yan guan » gan guan, yan yuan, yihan guan
jing ji » ying jin
dong di » dong sin

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: nan ((yang guang) OR (yan guan)) des ansatzes jing ji ((zhong tai) OR (dong di)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nan ((yang guang) OR (yan guan)) des ansatzes jing ji ((zhong tai) or (dong di)) ;~".
• Adding a wildcard symbol may retrieve word variants: nan ((yang guang) OR (yan guan)) des ansatzes jing ji ((zhong tai) or (dong di)) ;*.