Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duoc doi con snippets" » "cuoc doi con snippets", "duoc hoi con snippets", "luoc doi con snippets", "duoc doi cong snippets", "duoc doi co snippets", "duoc moi con 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: (((("duoc doi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duoc doi con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duoc doi con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duoc doi con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.