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