Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chuc nang du snippets" » "chuc nang tu snippets", "chuc nang luc snippets", "chuc nang doc snippets", "thuc nang du snippets", "chu nang du snippets", "chua nang du 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: (((("chuc nang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chuc nang du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chuc nang du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chuc nang du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.