Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dong qua con snippets" » "duong qua con snippets", "dong cua con snippets", "dong mua con snippets", "dong qua cong snippets", "dong qua co snippets", "dong cua 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 qua con 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 qua con snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong qua con snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong qua con snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.