Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan doc hoi snippets" » "phan duoc hoi snippets", "phan duc hoi snippets", "than doc hoi snippets", "phan hoc hoi snippets", "phan doc hai 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: (((("phan doc 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: (((("phan doc hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan doc hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan doc hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.