Perhaps you should try some spelling variations:
"cao hoc cong snippets" » "cao hoc code snippets", "cao hoc co snippets", "cao cac cong snippets", "cao hoc dung snippets", "co hoc cong snippets", "cho hoc cong snippets", "chat hoc cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"

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

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