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