Perhaps you should try some spelling variations:
lang planning » plans planning, range planning, kong planning
land planning » based planning, road planning, dam planning
dutch german » czech german, dutch green, dutch roman
gender his » gender bias, gender aids, gender als
times hong » time long, times how, times log
hong hai » shang hai, zhong tai, dang hai

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