Perhaps you should try some spelling variations:
"doc dao hoan snippets" » "doc dao code snippets", "doc dao doanh snippets", "doc vao hoang snippets", "doc do hoa snippets", "toc dao hoan snippets", "duc dao hoan snippets", "hoc dao hoan 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 ("doc dao hoan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("doc dao hoan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( doc dao hoan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("doc dao hoan snippets"))) or ("locating bug core snippets"))*.