Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"doi cua sio2 snippets" » "doi cua sinh snippets", "doi cao sio2 snippets", "doi cua so snippets", "hoi cua sio2 snippets", "dai cua sio2 snippets", "dong cua sio2 snippets"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("doi cua sio2 snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"doi cua sio2 snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( doi cua sio2 snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("doi cua sio2 snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.