Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luoc dan cua snippets" » "luoc danh cua snippets", "luoc dai cua snippets", "luoc can cua snippets", "luoc dan ca snippets", "luoc ban cua 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: (((("luoc dan cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luoc dan cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luoc dan cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luoc dan cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.