Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van khai ca snippets" » "van hai ca snippets", "van khi ca snippets", "dan khai ca snippets", "van khai cac snippets", "van thai cua snippets", "van khai pha 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 khai ca 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 khai ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van khai ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van khai ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.