Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"jun yang hye snippets" » "juan yang hye snippets", "jun yong hye snippets", "lijun yang hye snippets", "jun hwang hye snippets", "jun bang he snippets", "jun nang he snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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 java java snippets") or ("jun yang hye snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("jun yang hye snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( jun yang hye snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("jun yang hye snippets"))) or ("locating bug code snippets"))*.