Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"moi chon cac snippets" » "mo chon cac snippets", "moi cho cac snippets", "moi con cac snippets", "moi thong cac snippets", "moi hoc cac 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: (((("moi chon 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: (((("moi chon cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( moi chon cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("moi chon cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.