Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van kien doc snippets" » "van tien doc snippets", "van hien doc snippets", "van chien doc snippets", "van kien doi snippets", "van bien duoc snippets", "van bien doi 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 kien doc 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 kien doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van kien doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van kien doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.