Perhaps you should try some spelling variations:
yang qiang » yang liang, wang liang, yang yang
last think » last thing, last things
think zeng » think long
wang yang » wang yan, wang liang, wang yanling
qiang i » qiang li, qiang niu
doug di » dong di
i last » _ last, a last, 3 last
sin » sign, sind, skin

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang yang qiang i last think zeng ((doug di) or (dong sin)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang qiang i last think zeng ((doug di) OR (dong sin)) ;.
• Adding a wildcard symbol may retrieve word variants: wang yang qiang i last think zeng ((doug di) or (dong sin)) ;*.