Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"danh ca bo snippets" » "danh ca code snippets", "dan ca bo snippets", "doanh cua bo snippets", "danh cho bo snippets", "danh cua bo snippets", "danh can bo snippets", "danh cac bo snippets"

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

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