Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"da hoc thanh snippets" » "da hoc nhanh snippets", "da hoan thanh snippets", "da hoc phan snippets", "dai hoc thanh snippets", "dan hoc thanh snippets", "day hoc thanh snippets", "da hoc thanh 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: (((("da hoc thanh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("da hoc thanh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( da hoc thanh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("da hoc thanh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.