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