Perhaps you should try some spelling variations:
"gian thanh o snippets" » "gia thanh o snippets", "ban thanh o snippets", "van thanh o snippets", "gian thanh do snippets", "gian thanh ho snippets", "gian thanh vo snippets"
"python using java snippets" » "python using data snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("gian thanh o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("gian thanh o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( gian thanh o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("gian thanh o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.