Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"mo hoc sio2 snippets" » "mo hoc sinh snippets", "mo hoc gioi snippets", "mo hoc sieu snippets", "mon hoc sio2 snippets", "co hoc sio2 snippets"

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

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