Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van menh te snippets" » "van minh te snippets", "van manh te snippets", "van anh te snippets", "van benh te snippets", "van menh de snippets", "van benh tre 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 menh te 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 menh te snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van menh te snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van menh te snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.