Perhaps you should try some spelling variations:
chiet tach » chieu sach
thong cong » trong cong, tong cong, thong thong
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
ho chiet » ho chieu, ho thiet, hoc thiet
cong san » cong tac
san phan » san pham, van phan, sat phan
phan dau » phan tu, hang dau

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 - hanh ((trung cua) or (trung cap)) thong cong san phan dau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - hanh ((trung cua) OR (trung cap)) thong cong san phan dau*.