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