Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"son vung doc snippets" » "son tung doc snippets", "so vung doc snippets", "ngon vung doc snippets", "son vung moc snippets", "son vung doi snippets", "son vung hoc 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: (((("son vung doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("son vung doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( son vung doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("son vung doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.