Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tu lieu code snippets" » "tu lieu cong snippets", "tu lieu co snippets", "tu lieu che snippets", "du lieu code snippets", "tu liem code snippets", "tai lieu 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: (((("tu lieu 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: (((("tu lieu code snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( tu lieu code snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tu lieu code snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.