Perhaps you should try some spelling variations:
under debate » gender debates, badger debate, der debatte
ding under » king under, riding under, ding und
crises how » crisis how
how state » how estate, how states, how stable
wing yan » wing ian, wang yang, ying yang
wing tan » wing ian, liang tan, hong tan

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((((wing yan) or (wang yan))) or (wing tan)) ding under debate during crises how state ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((((wing yan) OR (wang yan))) OR (wing tan)) ding under debate during crises how state ;.
• Adding a wildcard symbol may retrieve word variants: ((((wing yan) or (wang yan))) or (wing tan)) ding under debate during crises how state ;*.