Perhaps you should try some spelling variations:
human income » roman income, mean income, loan income
income scale » income share, income shares
mining thong » mining china, mining town, mining ghana
thong guan » cheng guan
yang fan » zhang fan, yang dean, yang yang
yang yi » yang xi, yang jui
3 human » 2 human
ng 3 » ngs 3, nr 3, n 3

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 fan) OR (yang yi))) OR (yang di))ng 3 human income scale mining thong guan ;~.
• Adding a wildcard symbol may retrieve word variants: ((((yang fan) or (yang yi))) or (yang di))ng 3 human income scale mining thong guan ;*.