Perhaps you should try some spelling variations:
"do dac chieu snippets" » "do dac code snippets", "do cac chieu snippets", "do da chieu snippets", "do dao chieu snippets", "do duc chieu snippets", "do dai chieu snippets", "so dac chieu snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using data snippets" » "python using java snippets", "python using sat snippets", "python missing data snippets"

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

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