Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khao nam cac snippets" » "khac nam cac snippets", "khanh nam cac snippets", "khao sat cac snippets", "khao nam cao snippets", "khao nam sach 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: (((("khao nam cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khao nam cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khao nam cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khao nam cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.