Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"diem da cau snippets" » "dien da cau snippets", "diem a cau snippets", "diem du cau snippets", "diem dat cau snippets", "diem va cau 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: (((("diem da cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("diem da cau snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( diem da cau snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("diem da cau snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.