Perhaps you should try some spelling variations:
"dang thanh hoan snippets" » "dong thanh hoan snippets", "dang hanh hoan snippets", "hoang thanh hoan snippets", "dang thanh hoang snippets", "dang thanh hoa snippets", "dang thanh toan snippets"
"dung java java snippets" » "dung va java 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 thanh hoan 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 thanh hoan snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang thanh hoan snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang thanh hoan snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.