Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhung nam me snippets" » "chung nam me snippets", "nhung pham me snippets", "nhung bai me snippets", "nhung nam men snippets", "nhung dam me snippets", "nhung nam he 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 nam me 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 nam me snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhung nam me snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhung nam me snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.