Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van than hoi snippets" » "van thanh hoi snippets", "van thang hoi snippets", "van tuan hoi snippets", "van than khoi snippets", "van than hoc snippets", "van phan 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: (((("van than hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van than hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van than hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van than hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.