Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nhat minh he snippets" » "pham minh he snippets", "nha kinh he snippets", "nhan sinh he snippets", "nhat minh hue snippets", "nhat hinh he snippets", "nhat minh ve 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: (((("nhat minh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhat minh he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nhat minh he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nhat minh he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.