Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong mi voi snippets" » "cong li voi snippets", "cong ma voi snippets", "cong ti voi snippets", "cong moi voi snippets", "cong hmi voi snippets", "cong minh voi 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: (((("cong mi 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: (((("cong mi voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong mi voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong mi voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.