Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"du hoc con snippets" » "du hoc code snippets", "du hoc cong snippets", "du hoc cuon snippets", "du hoc co snippets", "tu hoc con snippets", "duoc hoc con snippets"
"python using java snippets" » "python using data 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: "((((\"du hoc con snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( du hoc con snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("du hoc con snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.