Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi nhung ve snippets" » "thi nang ve snippets", "thi hong ve snippets", "thi huong ve snippets", "thi chung ve snippets", "thi nhung ke snippets", "thi nhung le 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: (((("thi nhung ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi nhung ve snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi nhung ve snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi nhung ve snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.