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