Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
cong thanh » dong thanh, cong tan, truong thanh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
ho thiet » hoc thiet, hoa thiet, hoc thieu
so thiet » soc thiet, hoc thiet, hoa thiet
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: ((ho thiet) or (so thiet)) tach - hanh trung cua nhung ((cong thanh) OR (cong trinh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho thiet) OR (so thiet)) tach - hanh trung cua nhung ((cong thanh) OR (cong trinh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho thiet) or (so thiet)) tach - hanh trung cua nhung ((cong thanh) OR (cong trinh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: ((ho thiet) or (so thiet)) tach - hanh trung cua nhung ((cong thanh) OR (cong trinh)) toan ban*.