Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"how cao quoc snippets" » "how cac quoc snippets", "how cao thuoc snippets", "how han quoc snippets", "hoc cao quoc snippets", "how can quoc snippets", "how cao quoc 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: (((("how cao quoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("how cao quoc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( how cao quoc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("how cao quoc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.