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