Perhaps you should try some spelling variations:
"python using raw snippets" » "python using real snippets", "python using a snippets", "python using low snippets"
"khoa hoc code snippets" » "hoa hoc code snippets", "khoa hoc co snippets", "khoa hoc cong snippets", "khoa hoc de snippets"
"locating bug core snippets" » "locating bug code 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 raw snippets") or ("khoa hoc code snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using raw snippets") OR ("khoa hoc code snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using raw snippets ) or ( khoa hoc code snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using raw snippets") or ("khoa hoc code snippets"))) or ("locating bug core snippets"))*.