Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"luong dao he snippets" » "duong dao he snippets", "truong dao he snippets", "luong giao he snippets", "luong tao he snippets", "luong dao ho snippets", "luong dao 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: (((("luong dao 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: (((("luong dao he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong dao he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong dao he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.