Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"da hieu cac snippets" » "da hieu luc snippets", "da hieu va snippets", "da hieu van snippets", "dao hieu cac snippets", "dat hieu cac snippets", "da chieu cac 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: (((("da hieu cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("da hieu cac snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( da hieu cac snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("da hieu cac snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.