Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cao sinh de snippets" » "cho sinh de snippets", "cao minh de snippets", "bao sinh de snippets", "cao sinh dh snippets", "cao sinh dai snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("cao sinh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cao sinh de snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cao sinh de snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cao sinh de snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.