Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vay toan do snippets" » "van toan do snippets", "va toan do snippets", "vay doanh do snippets", "vay toan ho snippets", "vay toan co snippets", "vay toan du 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: (((("vay toan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("vay toan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vay toan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vay toan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.