Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van anh phe snippets" » "van thanh phe snippets", "van minh phe snippets", "tuan anh phe snippets", "van anh pho snippets", "van anh nghe snippets", "van anh phan 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 anh 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 anh phe snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van anh phe snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van anh phe snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.