Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vun hoc te snippets" » "vung hoc te snippets", "van hoc te snippets", "vun hoa te snippets", "vun hoc tu snippets", "vun hoc he 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: (((("vun hoc te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vun hoc te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vun hoc te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vun hoc te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.