Perhaps you should try some spelling variations:
nhung tuong » nhung phuong, hung vuong, nhung cong
nhung huong » nhung phuong, nhung cong, nhung dung
thiet tach » chiet tach, thien hach, thuat tach
trinh vat » trinh van, trinh luat, sinh vat
ho thiet » hoc thiet, hoa thiet, so thiet
trinh va » trinh van, trinh ve, trinh vi
dan toan » van toan, dan than, manh toan
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 tach - hanh ((trinh va) or (trinh vat)) ((nhung huong) OR (nhung tuong)) dan toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - hanh ((trinh va) OR (trinh vat)) ((nhung huong) OR (nhung tuong)) dan toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho thiet tach - hanh ((trinh va) or (trinh vat)) ((nhung huong) OR (nhung tuong)) dan toan ban".
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - hanh ((trinh va) or (trinh vat)) ((nhung huong) OR (nhung tuong)) dan toan ban*.