Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"di quanh doc snippets" » "di quan doc snippets", "di quan doi snippets", "di quang hoc snippets", "do quang doc snippets", "bi quang doc snippets", "de quan doc 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: (((("di quanh doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("di quanh doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( di quanh doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("di quanh doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.