Perhaps you should try some spelling variations:
"dang sinh da snippets" » "dang dinh da snippets", "khang sinh da snippets", "dang hanh da snippets", "dang sinh dai snippets", "dang sinh dao snippets", "dang sinh va 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 sinh da 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 sinh da snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang sinh da snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang sinh da snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.