Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao nam cac snippets" » "cao dam cac snippets", "dao nam cac snippets", "cai nam cac snippets", "cao nam cao snippets", "cao 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: (((("cao 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: (((("cao nam cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao nam cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao nam cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.