Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toan hoc te snippets" » "toan khoa te snippets", "van hoc te snippets", "hoa hoc te snippets", "toan hoc tu snippets", "toan 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: (((("toan 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: (((("toan hoc te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toan hoc te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toan hoc te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.