Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van ton cac snippets" » "van toan cac snippets", "van tan cac snippets", "van toi cac snippets", "van trong cac snippets", "van thong cac snippets", "van tong cuc 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 ton cac 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 ton cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van ton cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van ton cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.