Perhaps you should try some spelling variations:
bonds china » roads china, funds china, goods china
china guan » china grain, china gain, china guangxi
yang yang » wang yang, wang yan
gene bank » gene banks, one bank, genomen bank
man gene » human gene, man glen, man one
yang xi » yang yi, yang jui
nr 27 » nr 2, nr 22, nr 23
nr 7 » nr 74, nr 1, nr 2

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: ((((yang xi) OR (yang yang))) OR (yang di))((nr 7) OR (nr 27)) man gene bank bonds china guan ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((yang xi) or (yang yang))) or (yang di))((nr 7) OR (nr 27)) man gene bank bonds china guan ;~".
• Adding a wildcard symbol may retrieve word variants: ((((yang xi) or (yang yang))) or (yang di))((nr 7) OR (nr 27)) man gene bank bonds china guan ;*.