Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tong cot snippets" » "van thong cot snippets", "van trong cot snippets", "van tuong cot snippets", "van tong cong snippets", "van tong hop snippets", "van dong co 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 tong cot 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 tong cot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tong cot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tong cot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.