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