Perhaps you should try some spelling variations:
hanh tranh » hanh trinh, hanh trang, lanh tranh
theo chieu » theo tieu, ho chieu, thi chieu
nhung cong » dung cong, thong cong, hang cong
theo chu » cho chu, chao chu, theo yeu
cong san » cong tac
san khau » san pham, san khoa, san phu
khau cap » khan cap, khau cao, khau tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((theo chieu) OR (theo chu)) tinh - ((hanh tranh) or (canh tranh)) va nhung cong san khau cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) tinh - ((hanh tranh) OR (canh tranh)) va nhung cong san khau cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (theo chu)) tinh - ((hanh tranh) or (canh tranh)) va nhung cong san khau cap".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (theo chu)) tinh - ((hanh tranh) or (canh tranh)) va nhung cong san khau cap*.