Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
lihong tan » liang tan, minghong tan
qian wang » yiqian wang, qian rong, qian yan
yang wang » yang yang, yan wang, yang liang
wai qian » wei qiang, ji qian, wai yan
test » text, west, best
lihong » lilong
hong » long

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: wai qian wang zhi (rest OR test) ((yang wang) OR (yang guang)) ((lihong tan) OR (hong tan)) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wai qian wang zhi (rest or test) ((yang wang) OR (yang guang)) ((lihong tan) or (hong tan)) ;~".
• Adding a wildcard symbol may retrieve word variants: wai qian wang zhi (rest or test) ((yang wang) OR (yang guang)) ((lihong tan) or (hong tan)) ;*.