Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"doc hai duc snippets" » "hoc hai duc snippets", "do hai duc snippets", "duc hai duc snippets", "doc hoai duc snippets", "doc mai duc snippets", "doc hai cuc 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: "((((\"doc hai duc snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( doc hai duc snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("doc hai duc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.