Perhaps you should try some spelling variations:
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, hoc thieu
so thiet » soc thiet, hoc thiet, hoa 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) OR (so 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) OR (so thiet)) tach - hanh ((trong quan) OR (trong tuan)) trong cong bang tay cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho thiet) OR (so thiet)) tach - hanh ((trong quan) or (trong tuan)) trong cong bang tay cao".
• Adding a wildcard symbol may retrieve word variants: ((ho thiet) OR (so thiet)) tach - hanh ((trong quan) or (trong tuan)) trong cong bang tay cao*.