Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"hoc quan trinh snippets" » "hoc qua trinh snippets", "hoc quan tinh snippets", "hoc xuan trinh snippets", "hoc dan trinh snippets", "tac quan trinh snippets", "hoc phan trinh snippets", "hoc quan trinh slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"

Try widening your search to All Fields.

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