Perhaps you should try some spelling variations:
yang liang » wang liang, yan liang, yang yang
liang zili » liang lilin, liang li, liang zhi
wang yang » wang yan, wang liang, wang yanling
form 2017 » forum 2017
david ian » david a, david n
form 2.1 » form 1.1, form 7.2.1, reform 2.1
ian hai » dang hai

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 liang zili ((form 2017) OR (form 2.1)) david ian hai ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang liang zili ((form 2017) OR (form 2.1)) david ian hai ;*".