Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"doc dao cho snippets" » "toc dao cho snippets", "duc dao cho snippets", "hoc dao cho snippets", "doc cao cho snippets", "doc dac cho snippets", "doc dao ho 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 dao cho 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 dao cho snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doc dao cho snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doc dao cho snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.