Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van chi canh snippets" » "van thi canh snippets", "van chi anh snippets", "van chi danh snippets", "van chien canh snippets", "luan chi canh snippets", "van chat canh 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 chi canh 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 chi canh snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van chi canh snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van chi canh snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.