Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"juan cao du snippets" » "quang cao du snippets", "toan cao du snippets", "quan cau du snippets", "juan cao duc snippets", "juan cac du snippets", "juan cao su 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: (((("juan cao du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("juan cao du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( juan cao du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("juan cao du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.