Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luoc ve toan snippets" » "nuoc ve toan snippets", "luoc va toan snippets", "luoc vu toan snippets", "luoc ke toan snippets", "luoc le toan 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 ve toan 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 ve toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luoc ve toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luoc ve toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.