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