Perhaps you should try some spelling variations:
"cu doi chieu snippets" » "cu doi code snippets", "cu doc hieu snippets", "cu doi chi snippets", "cu ho chieu snippets", "cau doi chieu snippets", "tu doi chieu snippets", "co doi chieu 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: (((("cu doi chieu snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cu doi chieu snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cu doi chieu snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cu doi chieu snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.