Perhaps you should try some spelling variations:
things era » things here, things were, things a
wang yang » wang yan, wang liang, wang yanling
yang gang » yang guang, yang yang, eoyang gang
dan yang » daun yang, tan yang, yang yang
3 smart » a smart, 3.2 smart
4 smart » a smart
sin » sign, sind, skin

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 yang gang ((3 smart) OR (4 smart)) things era ((dan yang) OR (dong sin)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang gang ((3 smart) OR (4 smart)) things era ((dan yang) or (dong sin)) ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang gang ((3 smart) OR (4 smart)) things era ((dan yang) or (dong sin)) ;*.