Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"tra danh du snippets" » "tra danh code snippets", "tran danh du snippets", "trai doanh du snippets", "tran manh du snippets", "tra danh dau snippets", "tra danh tu snippets", "tra dinh du 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: (((("python using java snippets") or ("tra danh du snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("tra danh du snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( tra danh du snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("tra danh du snippets"))) or ("locating bug core snippets"))*.