Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet tach » chiet tach, thien hach, thuat tach
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
ban thanh » ban hanh, ban hang
dan than » dan chan, van than, dan toan
ban than » van thanh, ban hang, ban hanh

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 - thanh trung cua nhung cong ((dan than) or (((ban than) or (ban thanh)))) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - thanh trung cua nhung cong ((dan than) OR (((ban than) OR (ban thanh)))) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh trung cua nhung cong ((dan than) or (((ban than) or (ban thanh)))) cau*.