Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van canh da snippets" » "van anh da snippets", "van hanh da snippets", "van manh da snippets", "van canh dan snippets", "van can da snippets", "van canh va 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 canh da 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 canh da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van canh da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van canh da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.