Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao duc doan snippets" » "dao du doan snippets", "dao duc hoan snippets", "dao duc toan snippets", "giao duc doan snippets", "tao duoc doan 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: (((("dao duc doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao duc doan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao duc doan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao duc doan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.