Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khi moi code snippets" » "khi moi co snippets", "khi moi cong snippets", "khi moi con snippets", "thi moi code snippets", "khi doi code snippets", "khi hoi code snippets"
"locating bug core snippets" » "locating bug code snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("khi moi code snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khi moi code snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( khi moi code snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khi moi code snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.