Perhaps you should try some spelling variations:
"o trinh code snippets" » "o trinh cong snippets", "o trinh co snippets", "o trinh cad snippets", "co trinh code snippets", "o tinh code snippets", "n trinh code snippets"
"python using java snippets" » "python using data snippets"
"locating bug core snippets" » "locating bug code 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 trinh code 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 trinh code snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( o trinh code snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("o trinh code snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.