Perhaps you should try some spelling variations:
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets", "python using data slippers"
"va van tro snippets" » "va ban tro snippets", "va van tri snippets", "va van tru snippets", "va van tro slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("va van tro snippets") or ("python using data snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("va van tro snippets") OR ("python using data snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( va van tro snippets ) or ( python using data snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("va van tro snippets") or ("python using data snippets"))) or ("locating bug code snippets"))*.