Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu cac mot snippets" » "hieu luc mot snippets", "hieu va mot snippets", "hieu van mot snippets", "hieu cac mon snippets", "hieu cac moi snippets", "hieu cac cot 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: (((("hieu cac mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu cac mot snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu cac mot snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu cac mot snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.