Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tran doan o2 snippets" » "tran doan code snippets", "trang doan o2 snippets", "tan doan o2 snippets", "tran hoan o2 snippets", "tran doan o 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: (((("tran doan o2 snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"tran doan o2 snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( tran doan o2 snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tran doan o2 snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.