Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
trang tuan » tran tuan, trong tuan, tran xuan
trung tuan » trung thanh, trung tam, tran tuan
manh toan » thanh toan, anh tuan, tinh toan
ho thiet » hoc thiet, hoa thiet, so thiet
san toan » van toan, dan toan, xuan toan

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 ((trang tuan) OR (trung tuan)) trong cong ((san toan) or (manh toan)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - hanh ((trang tuan) OR (trung tuan)) trong cong ((san toan) OR (manh toan)) ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho thiet tach - hanh ((trang tuan) OR (trung tuan)) trong cong ((san toan) or (manh toan)) ban".
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - hanh ((trang tuan) OR (trung tuan)) trong cong ((san toan) or (manh toan)) ban*.