Perhaps you should try some spelling variations:
"quang phan o snippets" » "quang chan o snippets", "quang phat o snippets", "quang thanh o snippets", "quang phan bo snippets", "quang phan co snippets", "quang phan mo snippets"
"python using java snippets" » "python using data snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("quang phan o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quang phan o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("quang phan o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.