Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tac danh moi snippets" » "sach danh moi snippets", "cac doanh moi snippets", "cac dan moi snippets", "tac doanh moi snippets", "tac dinh moi snippets", "tac hanh moi 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: (((("tac danh moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tac danh moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tac danh moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tac danh moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.