Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van che hoat snippets" » "van che khoa snippets", "van cao hoat snippets", "van co hoat snippets", "han che hoat snippets", "van chi hoat snippets", "van cho 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 che 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 che hoat snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van che hoat snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van che hoat snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.