Perhaps you should try some spelling variations:
"quang lam trinh snippets" » "quang nam trinh snippets", "dung lam trinh snippets", "quang cao trinh snippets", "quang lap trinh snippets", "quang lam tinh snippets", "quang tao trinh snippets", "quang lam 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: (((("quang lam 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: (((("quang lam trinh snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quang lam trinh snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quang lam trinh snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.