Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van nhi yong snippets" » "van jhi yong snippets", "van thi cong snippets", "van thi hong snippets", "van chi yong snippets", "van noi yong snippets", "van nghe yong 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 nhi yong 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 nhi yong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van nhi yong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van nhi yong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.