Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"xuan tan so snippets" » "xuan toan so snippets", "xuan can so snippets", "xuan thanh so snippets", "xuan tan soi snippets", "xuan tan son snippets", "xuan than so 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: (((("xuan tan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("xuan tan so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( xuan tan so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("xuan tan so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.