Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"son dan cach snippets" » "son dan cac snippets", "son dan canh snippets", "son nhan cach snippets", "so dan cach snippets", "soc dan cach snippets", "son da 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: (((("son 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: (((("son dan cach snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( son dan cach snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("son dan cach snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.