Perhaps you should try some spelling variations:
"dung sai chen snippets" » "dung sai code snippets", "dung tai chen snippets", "dung va chen snippets", "dung dat chen snippets", "dung kai chen snippets", "dung xay chen snippets", "dung yan chen snippets"
"locating bug core snippets" » "locating bug code snippets"
"dung java java snippets" » "dung va java snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("dung sai chen snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung sai chen snippets") OR ("dung java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dung sai chen snippets ) or ( dung java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung sai chen snippets") or ("dung java java snippets"))) or ("locating bug core snippets"))*.