Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho bai toan snippets" » "cho bai tap snippets", "cho bac toan snippets", "cho ba toan snippets", "cho bao toan 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: (((("cho bai toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cho bai toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho bai toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho bai toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.