Perhaps you should try some spelling variations:
thanh tung » thanh cong
hoc thiet » hoc thieu, hoc thuyet, hoc hien
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoa thiet
tung cao » nung cao, truong cao, trung cap
dan phan » doan phan, dan chan, van phan
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chiet) or (hoc thiet)) tach - thanh tung cao ((dang cong) or (dung cong)) dan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (hoc thiet)) tach - thanh tung cao ((dang cong) OR (dung cong)) dan phan cac.
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) or (hoc thiet)) tach - thanh tung cao ((dang cong) or (dung cong)) dan phan cac*.