Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lan anh ho snippets" » "van anh ho snippets", "tuan anh ho snippets", "lan anh tho snippets", "lan anh hoc snippets", "lan manh ho 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: (((("lan anh ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lan anh ho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lan anh ho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lan anh ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.