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