Perhaps you should try some spelling variations:
"trinh vi code snippets" » "trinh va code snippets", "trinh ve code snippets", "trinh viet code snippets", "trinh vi core snippets", "trinh vi code slippers"
"dung ha data snippets" » "dung va data snippets", "dung he data snippets", "dung khoa data snippets", "dung a data snippets", "dung ha data slippers"
"locating bug code snippets" » "locating bug core snippets", "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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