Perhaps you should try some spelling variations:
change making » change using
making level » making lives, making love, making novel
wang ryang » wang yang, wang yan, wang liang
net change » net changes
lanka 4.2 » land 4.2, lanka 3.1, lanka 9.1
4.2 net » 4.2 next, 4.2 new, 3.2 net
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 yanling)) lanka 4.2 net change making level yeung ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((wang ryang) OR (wang yanling)) lanka 4.2 net change making level yeung ;.
• Adding a wildcard symbol may retrieve word variants: ((wang ryang) or (wang yanling)) lanka 4.2 net change making level yeung ;*.