Perhaps you should try some spelling variations:
"hoc tan doan snippets" » "hoc tan code snippets", "hoc tran doan snippets", "hoc tap doan snippets", "hoc van doan snippets", "hoc dan doan snippets", "hoc tai doan 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 ("hoc tan doan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("hoc tan doan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( hoc tan doan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("hoc tan doan snippets"))) or ("locating bug core snippets"))*.