Perhaps you should try some spelling variations:
change making » change using
making level » making lives, making love, making novel
lankas 3.4 » ranks 3.4
wang ryang » wang yang, wang liang, wang yong
net change » net changes
lanka 3.1 » lanka 9.1, lanka 11.1, lanka p.w
ryang » ryangg, rryang
yan » yang, ryan
yeung » young

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((wang ryang) or (wang yan)) ((lanka 3.1) or (lankas 3.4)) net change making level yeung ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang ryang) OR (wang yan)) ((lanka 3.1) OR (lankas 3.4)) net change making level yeung ;.
• Adding a wildcard symbol may retrieve word variants: ((wang ryang) or (wang yan)) ((lanka 3.1) or (lankas 3.4)) net change making level yeung ;*.