Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao vung he snippets" » "dan vung he snippets", "dao cuong he snippets", "dao van he snippets", "dao dung he snippets", "dao vung re snippets", "dao vung ho 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 vung he 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 vung he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao vung he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao vung he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.