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