Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van kai he snippets" » "van khai he snippets", "van hai he snippets", "van ai he snippets", "van tai he snippets", "van kai chen 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 kai he 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 kai he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van kai he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van kai he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.