Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan hung son snippets" » "van hung son snippets", "luan chung son snippets", "lan phuong son snippets", "lan hang son snippets", "lan hong son snippets", "lan hoang son 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: (((("lan hung son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lan hung son snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan hung son snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan hung son snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.