Perhaps you should try some spelling variations:
"quang hoan c snippets" » "quang hoang c snippets", "quang doan c snippets", "quang thoai c snippets", "quang hoan cua snippets", "quang hoan lac snippets", "quang hoang cd 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"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("quang hoan c 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 hoan c snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("quang hoan c snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.