Perhaps you should try some spelling variations:
yang guang » yang yang, yan guan, yang liang
yang wang » yang yang, yan wang, yang liang
tuan hua » tan hua, tuan vu, yuan hui
pei yang » wei yang, hui yang, pei yun
3.1 long » 3 long, 3.1 low
3.2 long » 3.2 land
hua pei » hua wei

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((yang wang) or (yang guang)) tuan hua pei yang ((((3.1 long) or (6.2 long))) or (3.2 long)) du ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((yang wang) OR (yang guang)) tuan hua pei yang ((((3.1 long) OR (6.2 long))) OR (3.2 long)) du ;.
• Adding a wildcard symbol may retrieve word variants: ((yang wang) or (yang guang)) tuan hua pei yang ((((3.1 long) or (6.2 long))) or (3.2 long)) du ;*.