Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao gap voi snippets" » "tao gap voi snippets", "dao giao voi snippets", "dat ngap voi snippets", "dao giap voi snippets", "dao cap voi snippets", "dao gap doi 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: (((("dao gap 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: (((("dao gap voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao gap voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao gap voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.