Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dao voi hoc snippets" » "dao voi code snippets", "da voi hoc snippets", "dao noi hoc snippets", "do voi hoc snippets", "dao hoi hoc snippets", "dao vi hoc snippets", "dao voi ho snippets"
"python using java snippets" » "python using data 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 voi hoc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao voi hoc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dao voi hoc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao voi hoc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.