Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chao den voi snippets" » "cham den voi snippets", "chao sen voi snippets", "chao yen voi snippets", "chao dien voi snippets", "chao den coi snippets", "chao den vai 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: (((("chao den voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chao den voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chao den voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chao den voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.