Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"thuoc tra 01 snippets" » "thuoc tram 01 snippets", "thuoc tru 01 snippets", "thuoc tren 01 snippets", "thuoc tra n1 snippets", "thuoc tra 02 snippets", "thuoc tra 03 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: (((("thuoc tra 01 snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thuoc tra 01 snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( thuoc tra 01 snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuoc tra 01 snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.