Perhaps you should try some spelling variations:
thanh phong » thanh phuong, khanh phong, thanh hong
chiet tach » chieu sach
cach chung » cac chung, cac chuong, cao chung
cach dung » sach dung, cach mang, tac dung
cong phan » cong nhan, cong khan, chong phap
phan toan » phan tan, phap toan, pham toan
ho chiet » ho chieu, ho thiet, hoc thiet
toan tap » toan ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - thanh phong ((cach dung) or (cach chung)) cong phan toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - thanh phong ((cach dung) OR (cach chung)) cong phan toan tap.
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh phong ((cach dung) or (cach chung)) cong phan toan tap*.