Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
chieu xanh » chieu sach, chieu sang, chieu tinh
hieu manh » hieu nganh, dieu hanh, hien hanh
trong van » trong cac
van khanh » van thanh, van hanh, van anh
phong tap » phong lap, phong tai, phuong tay
tap toan » tap doan, tap quan, bai toan
toan cao » toan ban, toan tap

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((hieu manh) or (chieu xanh)) - thanh trong van khanh phong tap toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu manh) OR (chieu xanh)) - thanh trong van khanh phong tap toan cao.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu manh) or (chieu xanh)) - thanh trong van khanh phong tap toan cao*.