Perhaps you should try some spelling variations:
centre one » central one, centre dome, centre de
wang yong » wang hyoung, wang yan, wang shiyong
wang yang » wang yan, wang liang
one small » some small
a centre » au centre, _ centre, a century
one task » dce task
jan a » jane a, can a, jan m

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: ((wang yanling) OR (((wang yong) OR (wang yang)))) jan a centre one task one small ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yanling) or (((wang yong) OR (wang yang)))) jan a centre one task one small ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yanling) or (((wang yong) OR (wang yang)))) jan a centre one task one small ;*.