Perhaps you should try some spelling variations:
"o giai chieu snippets" » "o giai code snippets", "o gioi thieu snippets", "o gian hieu snippets", "o gia hieu snippets", "so giai chieu snippets", "ro giai chieu snippets", "o gia chieu snippets"
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data 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: (((("o giai chieu snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("o giai chieu snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( o giai chieu snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("o giai chieu snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.