Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"dao hieu cac snippets" » "dao hieu code snippets", "cao hieu cac snippets", "van hieu cac snippets", "bao hiem cac snippets", "dao hieu luc snippets", "dao hieu va snippets", "dao hieu van 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 hieu cac 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 hieu cac snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( dao hieu cac snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao hieu cac snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.