Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cua voi can snippets" » "chua voi can snippets", "cua vi can snippets", "cua hoi can snippets", "cua voi cac snippets", "cua voi cong snippets", "cua voi hang 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 can 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 can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cua voi can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cua voi can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.