Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ngu tran thi slippers" » "ngu thanh thi slippers", "ngu trinh thi slippers", "ngu tap thi slippers", "ngu tran thi slippery", "ngu tran thi grippers"
"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: (((("ngu tran thi slippers") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ngu tran thi slippers") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ngu tran thi slippers ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ngu tran thi slippers") or ("python using java snippets"))) or ("locating bug code snippets"))*.