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