Perhaps you should try some spelling variations:
"hoi tap cach snippets" » "hoi tap code snippets", "hoi tap cac snippets", "hoi phap cach snippets", "hoi va cach snippets", "hoi dap cach snippets", "hoc tap cach snippets", "hoi tai cach 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 ("hoi tap cach snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("hoi tap cach snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( hoi tap cach snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("hoi tap cach snippets"))) or ("locating bug core snippets"))*.