Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong xay doi snippets" » "thong xay doi snippets", "trong xay doi snippets", "cong ty doi snippets", "cong tay doi snippets", "cong vay doi snippets", "cong thay doi 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: (((("cong xay 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: (((("cong xay doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong xay doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong xay doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.