Perhaps you should try some spelling variations:
"python missing data snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code snippets"
"han quoc 1 snippets" » "han duoc 1 snippets", "han quoc 2 snippets", "han quoc _ snippets", "phan quoc 1 snippets", "nhan quoc 1 snippets", "hanh quoc 1 snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("han quoc 1 snippets") or ("python missing data snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("han quoc 1 snippets") OR ("python missing data snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( han quoc 1 snippets ) or ( python missing data snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("han quoc 1 snippets") or ("python missing data snippets"))) or ("locating bug core snippets"))*.