Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cach khi doi snippets" » "cac khi doi snippets", "cach thoi doi snippets", "cach nhin doi snippets", "cach khi dai snippets", "cach khi hoi snippets", "cach khi moi 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: (((("cach khi doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cach khi doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cach khi doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cach khi doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.