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