Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hanh tranh » hanh trinh, hanh trang, lanh tranh
qua trong » quan trong, qua trinh, qua song
manh toan » thanh toan, anh tuan, tinh toan
ho thiet » hoc thiet, hoa thiet, so thiet
van tan » van tuan, van ban, van tai

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 tach - ((hanh tranh) or (canh tranh)) qua trong cong ((manh toan) or (van tan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - ((hanh tranh) OR (canh tranh)) qua trong cong ((manh toan) OR (van tan)) cao.
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - ((hanh tranh) or (canh tranh)) qua trong cong ((manh toan) or (van tan)) cao*.