Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"lin cuu hoan snippets" » "lin luu hoang snippets", "lin cuu van snippets", "lin cuu khoa snippets", "dinh cuu hoan snippets", "vinh cuu hoan 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: (((("lin cuu hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("lin cuu hoan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( lin cuu hoan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("lin cuu hoan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.