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