Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong duc du snippets" » "luong duc du snippets", "duong qua du snippets", "dang duc du snippets", "duong duc duy snippets", "duong cuc du snippets", "duong duc tu 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: (((("duong duc 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: (((("duong duc du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong duc du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong duc du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.