Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cua voi chon snippets" » "cua voi con snippets", "cua voi phong snippets", "cua voi chien snippets", "chua voi chon snippets", "cua vi chon snippets", "cua hoi chon 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: (((("cua voi chon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cua voi chon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cua voi chon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cua voi chon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.