Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"co trinh du snippets" » "co trinh code snippets", "co tranh du snippets", "cong trinh du snippets", "tao trinh du snippets", "co trinh duc snippets", "co trinh dau snippets", "co trinh duy 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: (((("co trinh du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("co trinh du snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( co trinh du snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("co trinh du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.