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