Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chi viec voi snippets" » "cho viec voi snippets", "chi viet voi snippets", "cuoi viec voi snippets", "chi viec cuoi snippets", "chi viec va snippets", "chi viec so 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: (((("chi viec 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: (((("chi viec voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chi viec voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chi viec voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.