Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"len dien cac snippets" » "den dien cac snippets", "lieu dien cac snippets", "kien dien cac snippets", "len vien cac snippets", "len dien cuc snippets", "len dien sach 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 dien 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: (((("len dien cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( len dien cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("len dien cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.