Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chi ngan can snippets" » "thi ngan can snippets", "chinh ngan can snippets", "chi nhanh can snippets", "chi ngan han snippets", "chi ngan van snippets", "chi ngan lan 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: (((("chi ngan can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chi ngan can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chi ngan can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chi ngan can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.