Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"thap do 3 snippets" » "thai do 3 snippets", "thap du 3 snippets", "tham do 3 snippets", "thap doc 3 snippets", "thap doi 3 snippets", "thap do _ 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: "((((\"python missing data snippets\") OR (\"thap do 3 snippets\"))) OR (\"locating bug core snippets\"))~".
• Removing quotes may allow a broader search: (((( python missing data snippets ) OR ( thap do 3 snippets ))) OR ( locating bug core snippets ))~.
• Adding a wildcard symbol may retrieve word variants: (((("python missing data snippets") OR ("thap do 3 snippets"))) OR ("locating bug core snippets"))*.