Perhaps you should try some spelling variations:
change mowing » change making, change coping, change mapping
change doing » change coping, change during, change using
things young » things you, things found, settings young
yang lanka » yang anda
wang yang » wang yan, wang liang, wang yanling
p.w best » 3.2 best, how best, 2.4 best
4.2 best » 3.2 best, 4.2 test

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 lanka ((p.w best) or (4.2 best)) ((change doing) OR (change mowing)) things young ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang yang lanka ((p.w best) OR (4.2 best)) ((change doing) OR (change mowing)) things young ;.
• The words AND, OR and NOT may confuse the search; try adding quotes: "wang yang lanka ((p.w best) or (4.2 best)) ((change doing) OR (change mowing)) things young ;".
• Adding a wildcard symbol may retrieve word variants: wang yang lanka ((p.w best) or (4.2 best)) ((change doing) OR (change mowing)) things young ;*.