Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pho ngu can snippets" » "phap ngu can snippets", "pham ngu can snippets", "pho nghe can snippets", "pho ngu ca snippets", "pho ngu van snippets", "pho ngu dan 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: (((("pho ngu can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pho ngu can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pho ngu can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pho ngu can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.