Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao voi doc snippets" » "da voi doc snippets", "dao noi doc snippets", "do voi doc snippets", "dao voi doi snippets", "dao voi dac snippets", "dao voi hoc 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 voi doc 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 voi doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao voi doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao voi doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.