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