Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toan cua da snippets" » "than cua da snippets", "tan cua da snippets", "doanh cua da snippets", "toan cua dan snippets", "toan cua dai snippets", "toan cua dam 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 cua da 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 cua da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toan cua da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toan cua da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.