Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nang toan du snippets" » "dang toan du snippets", "nang soan du snippets", "nang thanh du snippets", "nang tran duc snippets", "nang 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: (((("nang 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: (((("nang toan du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang toan du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang toan du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.