Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van hieu phe snippets" » "cao hieu phe snippets", "van hieu he snippets", "van hieu pham snippets", "van hieu phap 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 hieu phe 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 hieu phe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van hieu phe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van hieu phe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.