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