Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao cong da snippets" » "dao cuong da snippets", "cao cong da snippets", "dao dong da snippets", "dao cong dan snippets", "dao cong dac snippets", "dao cong dau 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 cong da 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 cong da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao cong da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao cong da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.