Perhaps you should try some spelling variations:
lang planning » plans planning, range planning, kong planning
land planning » based planning, road planning, dam planning
german gender » german lander, germany under, german border
data german » dutch german
gender his » gender bias, gender aids, gender als
his time » his times, bias time, his life
hong hai » shang hai, zhong tai, hong tan

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: ((lang planning) OR (land planning)) data german gender his time ((hong hai) OR (dang hai)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lang planning) or (land planning)) data german gender his time ((hong hai) OR (dang hai)) ;~".
• Adding a wildcard symbol may retrieve word variants: ((lang planning) or (land planning)) data german gender his time ((hong hai) OR (dang hai)) ;*.