Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cach tieu do snippets" » "sach thieu do snippets", "cach bien do snippets", "cach tu do snippets", "cach trieu do snippets", "cach tien do snippets", "cach bieu do 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 tieu do 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 tieu do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cach tieu do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cach tieu do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.