Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luc danh du snippets" » "luoc danh du snippets", "luc canh du snippets", "luan danh du snippets", "luc danh dau snippets", "luc danh tu snippets", "luc dinh 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: (((("luc danh 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: (((("luc danh du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luc danh du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luc danh du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.