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