Perhaps you should try some spelling variations:
thanh tung » thanh cong
quan trong » gian trong
hieu manh » chieu xanh, hieu nganh, dieu hanh
tung quan » tuong quan, trung quan, dung quan
cong tuan » cong luan, cong thanh, cong quang
hoc hieu » hoc thieu, hoc hien, doc hieu
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu manh - thanh tung quan trong ((cong tuan) OR (cong tan)) phan cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hieu manh - thanh tung quan trong ((cong tuan) OR (cong tan)) phan cau".
• Adding a wildcard symbol may retrieve word variants: hoc hieu manh - thanh tung quan trong ((cong tuan) OR (cong tan)) phan cau*.