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
human gender » bhutan gender, human gene, human genome
bias time » bias die, das time, his time
time hong » time long, time among, time how
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 ((human gender) OR (german gender)) bias time hong hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((lang planning) or (land planning)) data ((human gender) OR (german gender)) bias time hong hai ;~".
• Adding a wildcard symbol may retrieve word variants: ((lang planning) or (land planning)) data ((human gender) OR (german gender)) bias time hong hai ;*.