Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che cuong do snippets" » "che cong do snippets", "cao cuong do snippets", "thi cuong do snippets", "che cuong dao snippets", "che cuong vo snippets", "che luong do 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: (((("che cuong 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: (((("che cuong do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che cuong do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che cuong do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.