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