Perhaps you should try some spelling variations:
"con cuu hoan snippets" » "con cuu code snippets", "con luu hoang snippets", "con cuu van snippets", "con cuu khoa snippets", "con cua hoan snippets", "con cu hoan snippets", "cong cua hoan snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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 ("con cuu hoan snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("con cuu hoan snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( con cuu hoan snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("con cuu hoan snippets"))) or ("locating bug core snippets"))*.