Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dong tan cong snippets" » "duong tan cong snippets", "dong tai cong snippets", "dong san cong snippets", "dong tan cuong snippets", "dong tran cong snippets", "dong toan 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: (((("dong tan 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: (((("dong tan cong snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong tan cong snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong tan cong snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.