Perhaps you should try some spelling variations:
"thi hanh code snippets" » "thi hanh de snippets", "thi hanh cong snippets", "thi hanh cad snippets", "thi thanh code snippets"
"python using raw snippets" » "python using real snippets", "python using a snippets", "python using low snippets"
"locating bug core snippets" » "locating bug code snippets"

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

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