Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van cua loc snippets" » "vang cua loc snippets", "ban cua loc snippets", "dan cua loc snippets", "van chua loc snippets", "van cua hoc snippets", "van cua lop 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 cua loc 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 cua loc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van cua loc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van cua loc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.