Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van thac ke snippets" » "van hac ke snippets", "van tham ke snippets", "van than ke snippets", "van tac ke snippets", "van thuc ke snippets", "van thanh ke 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 thac ke 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 thac ke snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van thac ke snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van thac ke snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.