Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khu hoc can snippets" » "khi hoc can snippets", "thu hoc can snippets", "khung hoc can snippets", "khu hoc dan snippets", "khu hoc cao snippets", "khu hoc cac 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: (((("khu hoc can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khu hoc can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khu hoc can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khu hoc can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.