Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khun tinh du snippets" » "khuong tinh du snippets", "thue tinh du snippets", "thuy tinh du snippets", "khun tinh duc snippets", "khun tinh dau snippets", "khun tich du 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: (((("khun tinh 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: (((("khun tinh du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khun tinh du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khun tinh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.