Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lich hoc can snippets" » "dich hoc can snippets", "lich thuc can snippets", "sinh hoc can snippets", "lich hoc dan snippets", "lich hoc cao snippets", "lich 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: (((("lich 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: (((("lich hoc can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lich hoc can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lich hoc can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.