Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khoi vu cac snippets" » "khoi su cac snippets", "khoi va cac snippets", "khoi cua cac snippets", "khoi tu cac snippets", "khoi ve cac 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: (((("khoi vu 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: (((("khoi vu cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khoi vu cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khoi vu cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.