Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phan tan voi snippets" » "phan van voi snippets", "phan tap voi snippets", "phan lan voi snippets", "phan than voi snippets", "phan ban voi snippets", "phan tan hoi 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: (((("phan tan 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: (((("phan tan voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phan tan voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan tan voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.