Perhaps you should try some spelling variations:
"hoc chi hoan snippets" » "hoc chi code snippets", "hoc choi hoan snippets", "hoc thi hoan snippets", "hoc chi hoa snippets", "hoc chia hoan snippets", "hoc cho hoan snippets", "hoc chu hoan snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data 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: (((("python using java snippets") or ("hoc chi 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 ("hoc chi hoan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( hoc chi hoan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("hoc chi hoan snippets"))) or ("locating bug core snippets"))*.