Perhaps you should try some spelling variations:
"toc cao cong snippets" » "toc cao code snippets", "toc cac cong snippets", "toc cao dang snippets", "toc cua cong snippets", "hoc cao cong snippets", "toc dao cong snippets", "toc co 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 ("toc 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 (\"toc cao cong snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( python using java snippets ) OR ( toc cao cong snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") OR ("toc cao cong snippets"))) OR ("locating bug core snippets"))*.