Perhaps you should try some spelling variations:
khong cong » thong cong, khong cang, chong cong
chiet tach » chieu sach
hanh tinh » hanh trinh, nhanh tinh, thanh tinh
cua khong » hua khong, cua phuong, cua thuong
ho chiet » ho chieu, ho thiet, hoc thiet
tinh cua » trinh cua, sinh cua, tinh chat
tan ran » tan van, tan san, tan rao

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 tinh cua khong cong ((tan ran) OR (tan tran)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - hanh tinh cua khong cong ((tan ran) OR (tan tran)) cau*".