Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nang doan do snippets" » "nang dan do snippets", "nang soan do snippets", "hang doanh do snippets", "nang doan o snippets", "nang toan do snippets", "nang doanh dao 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 doan do 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 doan do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang doan do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang doan do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.