Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len cong cau snippets" » "den cong cau snippets", "le cong cau snippets", "len con cau snippets", "len cong cu snippets", "len cong chuc snippets", "len thong cau 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: (((("len cong cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("len cong cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len cong cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len cong cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.