Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van toan de snippets" » "van toan code snippets", "van tuan de snippets", "van tan de snippets", "van thanh de snippets", "van toan du snippets", "van toan ke snippets", "van toan ve snippets"
"python using java snippets" » "python using data snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java snippets") OR ("van toan de snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"python using java snippets\") OR (\"van toan de snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( python using java snippets ) OR ( van toan de snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") OR ("van toan de snippets"))) OR ("locating bug core snippets"))*.