Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"han tong con snippets" » "han tong cong snippets", "han trong con snippets", "han tong cot snippets", "phan tong con snippets", "nhan tong con snippets", "hanh tong con 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: (((("han tong con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han tong con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( han tong con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han tong con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.