Perhaps you should try some spelling variations:
heating demand » housing demand, heat demand
being heating » being hearing, being shaping
demand may » demand a, demand gap, demand mbale
huang jing » huang ting, huang ying, huang bin
kyoung yun » kyoung yang, hyoung gun, young eun
wang jing » wang ning, wang liang, wang yang
young yun » young eun, young young, young men
may wei » ma wei

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: being heating demand may wei ((wang jing) OR (huang jing)) ((young yun) OR (kyoung yun)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "being heating demand may wei ((wang jing) or (huang jing)) ((young yun) OR (kyoung yun)) ;~".
• Adding a wildcard symbol may retrieve word variants: being heating demand may wei ((wang jing) or (huang jing)) ((young yun) OR (kyoung yun)) ;*.