Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac khoa can snippets" » "cac khoan can snippets", "cac khoi can snippets", "dac khoa can snippets", "cac khoa cam snippets", "cac khoa cap 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: (((("cac khoa can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cac khoa can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac khoa can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac khoa can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.