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