Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"duong co cong snippets" » "dong co cong snippets", "dung co cong snippets", "duong cao cong snippets", "duong cho cong snippets", "duong bo cong 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: (((("duong co cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong co cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong co cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong co cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.