Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
nhung cong » dung cong, thong cong, hang cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
duong dao » dong dao, luong dao, truong dao
dan thanh » dang thanh, danh thanh, ban thanh
thanh lap » thanh san, phan lap, thanh hai
cong dan » cong san, cong tan, huong dan
tung va » trung va, tuong va, dung va

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 ((tung va) or (duong dao)) nhung cong dan thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - thanh ((tung va) OR (duong dao)) nhung cong dan thanh lap.
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh ((tung va) or (duong dao)) nhung cong dan thanh lap*.