Perhaps you should try some spelling variations:
"doi duy hoat snippets" » "doi duy code snippets", "doi duy hoang snippets", "doi qua hoat snippets", "doi duy vat snippets", "do duy hoat snippets", "doi day hoat snippets", "doi quy hoat snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java snippets") or ("doi duy hoat snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("doi duy hoat snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( doi duy hoat snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("doi duy hoat snippets"))) or ("locating bug core snippets"))*.