Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"long vu hoan snippets" » "long ve hoan snippets", "luong va hoan snippets", "long cua hoan snippets", "long vu hoang snippets", "long su hoan snippets", "long thu hoan 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: (((("long vu hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("long vu hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( long vu hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("long vu hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.