Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu vu cham snippets" » "hieu va cham snippets", "hieu ve cham snippets", "hieu su cham snippets", "hieu vu kham snippets", "hieu tu cham 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 vu cham 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 vu cham snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu vu cham snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu vu cham snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.