Perhaps you should try some spelling variations:
"doan quan tinh snippets" » "doan quang tinh snippets", "dan quan tinh snippets", "toan quan tinh snippets", "doan quan binh snippets", "doan quang ninh snippets", "doan quang binh snippets", "doan quan tinh slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("doan quan tinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("doan quan tinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( doan quan tinh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doan quan tinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.