Perhaps you should try some spelling variations:
"dong using java snippets" » "dong ming java snippets", "dong song java snippets", "dong using data snippets"
"dung dung de snippets" » "duong dung de snippets", "ung dung de snippets", "dung ung de snippets", "dung dung he snippets", "dung dung dat 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 using java snippets") or ("dung dung de snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong using java snippets") OR ("dung dung de snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong using java snippets ) or ( dung dung de snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong using java snippets") or ("dung dung de snippets"))) or ("locating bug code snippets"))*.