Perhaps you should try some spelling variations:
demand during » demands during, poland during, demand making
during kyoung » during your
cost demand » coal demand, coin demand, most demanded
kyoung yun » young yun, kyoung yang, hyoung gun
dong sign » dong sin, among sign, dong bin
wang yang » wang yan, wang liang, wang yanling
your cost » your most, your best, your boss
wan yan » wang yan, nan yan, wai yan
ya your » you your, day your, eat your

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: ((wan yan) OR (((wang yang) OR (dong sign)))) ya your cost demand during kyoung yun ;~.
• Adding a wildcard symbol may retrieve word variants: ((wan yan) or (((wang yang) or (dong sign)))) ya your cost demand during kyoung yun ;*.