Perhaps you should try some spelling variations:
dung phuong » dung thuong, bang phuong, dung chung
chiet tach » chieu sach
manh trung » manh tung, thanh trung, manh hung
hoc chiet » hoc thiet, hoc nhiet, hoc hien
trung dap » trung cap, trung dai, trung dam
dap dung » ap dung, dan dung, dap ung
dan toan » van toan, dan than, manh toan
van tan » van tuan, van ban, van tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - manh trung dap dung phuong ((dan toan) or (van tan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - manh trung dap dung phuong ((dan toan) OR (van tan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - manh trung dap dung phuong ((dan toan) or (van tan)) cau*.