Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac voi chon snippets" » "cac voi con snippets", "cac voi phong snippets", "cac voi chien snippets", "cac toi chon snippets", "cac vi chon snippets", "cac moi chon 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: (((("cac voi chon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac voi chon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac voi chon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac voi chon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.