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