Perhaps you should try some spelling variations:
based cropping » mixed cropping, based costing
cropping using » mapping using, cracking using, cropping looking
line based » fire based, rice based
yang yang » wang yang, wang yan
yang line » yang lin, yang liang, yang jie
dong sind » dong sin, dong bin, dong ping
fan yang » dan yang, fan ying, tan yang
dort von » ort von, hort von, art von
dort hin » dort bin, dort ii

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: fan yang yang line based cropping using ((((dort von) OR (dort hin))) OR (dong sind)) ;~.
• Adding a wildcard symbol may retrieve word variants: fan yang yang line based cropping using ((((dort von) or (dort hin))) or (dong sind)) ;*.