Perhaps you should try some spelling variations:
thanh trung » thanh tung
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, toc thieu
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
so thiet » soc thiet, hoa thiet, tao thiet
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban

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