Perhaps you should try some spelling variations:
thanh trung » thanh tung
thong cong » trong cong, tong cong, thong thong
trung cua » truong cua, trung tuan, trung cap
cua thong » cua thuong, cua khong, cua tong
hoc xanh » hoc anh, hoc hanh, hoc danh
dan than » ban than, van than, dan toan
dan chan » dan gian, dan ca, van chat
cho hoc » co hoc, khoa hoc

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

• Performing a fuzzy search may retrieve terms with similar spellings: cho hoc xanh - thanh trung cua thong cong ((dan than) or (dan chan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cho hoc xanh - thanh trung cua thong cong ((dan than) OR (dan chan)) cau.
• Adding a wildcard symbol may retrieve word variants: cho hoc xanh - thanh trung cua thong cong ((dan than) or (dan chan)) cau*.