Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van khuc do snippets" » "van phuc do snippets", "van thuc do snippets", "van phuoc do snippets", "van khu do snippets", "van khac do snippets", "van chuc dao 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 khuc do 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 khuc do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van khuc do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van khuc do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.