Perhaps you should try some spelling variations:
"truong hoc 1 snippets" » "trung hoc 1 snippets", "tuong ho 1 snippets", "truong bo 1 snippets", "truong hoc 10 snippets", "truong hoc 11 snippets", "truong hoc y snippets", "truong hoc 1 slippers"
"python using java snippets" » "python using data snippets", "python using java slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("truong hoc 1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("truong hoc 1 snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( truong hoc 1 snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("truong hoc 1 snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.