Perhaps you should try some spelling variations:
"tran hung lam snippets" » "tran hong lam snippets", "tran quang lam snippets", "tran hoang lam snippets", "tran dung lam snippets", "tran hung dam snippets", "tran phuong lam snippets", "tran hung lam 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: (((("tran hung lam snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tran hung lam snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tran hung lam snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran hung lam snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.