Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cua giet con snippets" » "cua viet con snippets", "cua triet con snippets", "cua nhiet con snippets", "cua diet con snippets", "cua viet co snippets", "cua biet lon 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 giet con 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 giet con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cua giet con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cua giet con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.