Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van tinh cao snippets" » "van thinh cao snippets", "van minh cao snippets", "ban tinh cao snippets", "van tinh lao snippets", "van tinh chat snippets", "van tinh cach 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 tinh cao 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 tinh cao snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van tinh cao snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van tinh cao snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.