Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"ung trong ca snippets" » "dung trong ca snippets", "cung trong ca snippets", "vung trong ca snippets", "ung trong cac snippets", "ung trong van snippets", "ung trong nha 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: (((("ung trong ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("ung trong ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( ung trong ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("ung trong ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.