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