Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoa can che snippets" » "khoa cam che snippets", "khoa cap che snippets", "khoi can che snippets", "khoa han che snippets", "khoa cac che snippets", "khoa can chi snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("khoa can che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khoa can che snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoa can che snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoa can che snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.