Perhaps you should try some spelling variations:
changes making » change making, changes taking, changes lacking
test changes » net changes, past changes, detect changes
making love » making level, making lives, making novel
wang yang » wang liang, wang yanling
lanka 3.1 » lanka 9.1, lanka 11.1, lankas 3.4
3.1 test » 4.1 test
yang » ryang
yan » ryan

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) OR (wang yan)) lanka 3.1 test changes making love (yeung OR young) ;~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((wang yang) or (wang yan)) lanka 3.1 test changes making love (yeung OR young) ;~".
• Adding a wildcard symbol may retrieve word variants: ((wang yang) or (wang yan)) lanka 3.1 test changes making love (yeung OR young) ;*.