Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
manh trung » manh tung, thanh trung, manh hung
trung tuan » trung thanh, trung tam, tran tuan
hoc thiet » hoc thieu, hoc thuyet, hoc hien
tuan cong » thuan cong, luan cong, tran cong
cong cong » cong dong, trong cong, dung cong
manh toan » thanh toan, anh tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet tach - manh trung tuan cong cong ((manh toan) or (tinh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - manh trung tuan cong cong ((manh toan) OR (tinh toan)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - manh trung tuan cong cong ((manh toan) or (tinh toan)) cao*.