Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"voi luoc cac snippets" » "voi cuoc cac snippets", "voi luc cac snippets", "voi quoc cac snippets", "voi duoc cac snippets", "voi luoc can 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 luoc cac 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 luoc cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( voi luoc cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("voi luoc cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.