Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"sach tao con snippets" » "sach dao con snippets", "sach bao con snippets", "sach tai con snippets", "sach cao cong snippets", "sach vao cong snippets", "sach tao dong 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: (((("sach tao 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: (((("sach tao con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( sach tao con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("sach tao con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.