Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
trong quan » thong quan, tong quan, thong quang
trong tuan » trung tuan, trong tan, trang tuan
cong bang » cuong bang, dong bang, hong bang
ho thiet » hoc thiet, hoa thiet, so thiet
bang tay » ban tay, bang may, mang tay
tay cao » tao cao, tay co, toan cao

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 ((trong quan) or (trong tuan)) trong cong bang tay cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - hanh ((trong quan) OR (trong tuan)) trong cong bang tay cao.
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - hanh ((trong quan) or (trong tuan)) trong cong bang tay cao*.