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