Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"dang dieu can snippets" » "dang dieu hanh snippets", "dang tiep can snippets", "dang dieu cua snippets", "dan dieu can snippets", "dong dieu can snippets", "nang dieu can 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: (((("dang dieu can snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang dieu can snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang dieu can snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang dieu can snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.