Perhaps you should try some spelling variations:
zhang making » change making, zhang ming, ang making
test zhang » test changes
hong yeung » ching yeung, kong young, wong heung
wang ryan » wang yan, wang yang, wang ban
lanka 4.2 » land 4.2, lanka 3.1, lanka 9.1
4.2 test » 3.2 test, 2.2 test
seung » sung

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

• Performing a fuzzy search may retrieve terms with similar spellings: wang ryan lanka 4.2 test zhang making ((hong yeung) or (hong seung)) ;~.
• If you are trying to use Boolean operators, they must be ALL CAPS: wang ryan lanka 4.2 test zhang making ((hong yeung) OR (hong seung)) ;.
• Adding a wildcard symbol may retrieve word variants: wang ryan lanka 4.2 test zhang making ((hong yeung) or (hong seung)) ;*.