Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"trong moi doi snippets" » "trong doi doi snippets", "trong mot doi snippets", "trong thoi doi snippets", "trong voi doi snippets", "trong hoi doi snippets", "trong moi voi 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 ("trong moi doi snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung java java snippets") OR ("trong moi doi snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung java java snippets ) or ( trong moi doi snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung java java snippets") or ("trong moi doi snippets"))) or ("locating bug code snippets"))*.