Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"toi dan cach snippets" » "toi dan cac snippets", "toi dan canh snippets", "toi nhan cach snippets", "toi dang cach snippets", "hoi dan cach snippets", "thi dan cach 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: (((("toi dan cach snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("toi dan cach snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( toi dan cach snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("toi dan cach snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.