Perhaps you should try some spelling variations:
"thu hoc cong snippets" » "thu hoc code snippets", "thu hoc co snippets", "thu cac cong snippets", "thu hoc dung snippets", "tu hoc cong snippets", "thu hoi cong snippets", "tru hoc cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using sat snippets" » "python using data snippets", "python using a snippets", "python using raw 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 sat snippets") OR ("thu hoc cong snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"python using sat snippets\") OR (\"thu hoc cong snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( python using sat snippets ) OR ( thu hoc cong snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using sat snippets") OR ("thu hoc cong snippets"))) OR ("locating bug core snippets"))*.