Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dong cua lop snippets" » "dung cua lop snippets", "cong cua lop snippets", "huong cua lop snippets", "dong cua loc snippets", "dong cua loai snippets", "dong chua loc 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: (((("dong cua lop snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dong cua lop snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dong cua lop snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dong cua lop snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.