Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pha van hoi snippets" » "pham van hoi snippets", "phan van hoi snippets", "phap van hoi snippets", "pha van choi snippets", "pha van hoai snippets", "pha van khoi 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: (((("pha van 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: (((("pha van hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pha van hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pha van hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.