Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che han cua snippets" » "chu han cua snippets", "che thanh cua snippets", "che pham cua snippets", "che hang cua snippets", "che nhan cua snippets", "che than cua 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 han cua 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 han cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che han cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che han cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.