Perhaps you should try some spelling variations:
"tich van trinh snippets" » "tich van thinh snippets", "tich van tinh snippets", "tich dan trinh snippets", "tich va trinh snippets", "trinh van trinh snippets", "dinh van trinh snippets", "tich van trinh 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.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("tich van trinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tich van trinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tich van trinh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tich van trinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.