Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"quoc cao hoi snippets" » "quoc bao hoi snippets", "quoc cac hoi snippets", "quoc cho hoi snippets", "quoc cau hoi snippets", "quoc co hoi snippets", "quoc cao hoc 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: (((("quoc cao hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("quoc cao hoi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( quoc cao hoi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("quoc cao hoi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.