Perhaps you should try some spelling variations:
reform 5.3.1 » reform 4.1
yang liang » wang liang, yan liang, yang yang
reform 3.1 » reform 4.1, reform 1, reform 4.2
david dang » david ian, david mant, david ng
wang yang » wang yan, wang liang, wang yanling
liang li » ling li, qiang li, liang wei

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 liang li ((reform 3.1) OR (reform 5.3.1)) ((david dang) OR (david a)) hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang liang li ((reform 3.1) OR (reform 5.3.1)) ((david dang) or (david a)) hai ;~".
• Adding a wildcard symbol may retrieve word variants: wang yang liang li ((reform 3.1) OR (reform 5.3.1)) ((david dang) or (david a)) hai ;*.