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