Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"con trang do snippets" » "con trung do snippets", "hong trang do snippets", "chon trong do snippets", "con trang o snippets", "con tang do snippets", "con trang de 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 trang 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 trang do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con trang do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con trang do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.