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