Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van duc con snippets" » "van duc code snippets", "van duy con snippets", "van du con snippets", "tran duc con snippets", "van duc cong snippets", "van duc ton snippets", "van duc cuong 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: (((("van duc con snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"van duc con snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( van duc con snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van duc con snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.