Perhaps you should try some spelling variations:
chiet tach » chieu sach
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoc thiet
tung vat » tang vat, tung va, luong vat
dung vat » dung va, dong vat, dung dat
cong tac » cong ty
tac tai » tac trai, tac thi, bac tai
tai cao » thai cao, tao cao, tai sao

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 tach - thanh ((tung vat) OR (dung vat)) dung cong tac tai cao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - thanh ((tung vat) OR (dung vat)) dung cong tac tai cao".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - thanh ((tung vat) OR (dung vat)) dung cong tac tai cao*.