Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"from dao voi snippets" » "from data voi snippets", "from a voi snippets", "from two voi snippets", "from da voi snippets", "from dao noi snippets", "from do voi 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: (((("from dao voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("from dao voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( from dao voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("from dao voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.