Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dan dung cot snippets" » "van dung cot snippets", "tin dung cot snippets", "ap dung cot snippets", "dan dung co snippets", "dan dung mot snippets", "dan dung 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: (((("dan dung cot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dan dung cot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dan dung cot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dan dung cot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.