Perhaps you should try some spelling variations:
"python using raw snippets" » "python using real snippets", "python using a snippets", "python using low snippets"
"danh cac ho snippets" » "dinh cac ho snippets", "danh ca ho snippets", "hanh cac ho snippets", "danh cac hop snippets", "danh cac hoc snippets", "danh cac co snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"danh cac ho snippets\") OR (\"python using raw snippets\"))) OR (\"locating bug code snippets\"))~".
• Removing quotes may allow a broader search: (((( danh cac ho snippets ) OR ( python using raw snippets ))) OR ( locating bug code snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("danh cac ho snippets") OR ("python using raw snippets"))) OR ("locating bug code snippets"))*.