Perhaps you should try some spelling variations:
"dan cao cong snippets" » "dan cao code snippets", "dan cac cong snippets", "dan cao dang snippets", "dan cua cong snippets", "dan ca cong snippets", "dam cao cong snippets", "dan bao 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 ("dan cao cong snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"python using java snippets\") OR (\"dan cao cong snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( python using java snippets ) OR ( dan cao cong snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") OR ("dan cao cong snippets"))) OR ("locating bug core snippets"))*.