Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
chiet tach » chieu sach
hoc chiet » hoc thiet, hoc nhiet, hoc hien
cong cong » cong dong, trong cong, dung cong
thanh cha » thanh ha, thanh phan, thanh pham
thanh nha » thanh nhan, thanh ha, thanh nga
dung cua » dung luan, dung cho
cong tac » cong ty

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc chiet tach - hanh ((dung cua) or (trung tuan)) cong cong tac ((thanh cha) OR (thanh nha))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc chiet tach - hanh ((dung cua) OR (trung tuan)) cong cong tac ((thanh cha) OR (thanh nha)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc chiet tach - hanh ((dung cua) or (trung tuan)) cong cong tac ((thanh cha) OR (thanh nha))".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - hanh ((dung cua) or (trung tuan)) cong cong tac ((thanh cha) OR (thanh nha))*.