Perhaps you should try some spelling variations:
nhung huong » nhung phuong, nhung tuong, nhung cong
thiet tach » chiet tach, thien hach, thuat tach
hoc thiet » hoc thieu, hoc thuyet, hoc hien
cong cua » dong cua, huong cua, thong cua
dan than » dan chan, ban than, van than
than cau » toan cau, phan cau, than cap
cong cu » chung cu

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thiet tach - thanh ((cong cua) or (cong cu)) nhung huong dan than cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - thanh ((cong cua) OR (cong cu)) nhung huong dan than cau.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh ((cong cua) or (cong cu)) nhung huong dan than cau*.