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