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