Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van ngoc cac snippets" » "tran ngoc cac snippets", "van hoc cac snippets", "van nghe cac snippets", "van ngon cac snippets", "van ngoc chau snippets", "van ngoc phac 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: (((("van ngoc 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: (((("van ngoc cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van ngoc cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ngoc cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.