Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"toc nha cua snippets" » "toa nha cua snippets", "hoc nha cua snippets", "toc ha cua snippets", "toc nhat cua snippets", "toc nhan cua snippets", "toc nghia cua 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: (((("toc nha cua snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toc nha cua snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toc nha cua snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toc nha cua snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.