Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"con trung do snippets" » "chon truong do snippets", "doan trung do snippets", "dong trung do snippets", "con trung bo snippets", "con trung co snippets", "con trung du 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: (((("con trung do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("con trung do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con trung do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con trung do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.