Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
canh trinh » canh tranh, hanh trinh, canh tinh
trinh toan » tinh toan, thanh toan, trinh han
toan duong » tuan duong, doan duong, toan uong
ho chieu » hoc thieu, doi chieu, mot chieu
cong san » cong tac
phan lap » phan dau

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 (ho chieu)) tinh - canh trinh toan duong ((huong dan) or (cong san)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) tinh - canh trinh toan duong ((huong dan) OR (cong san)) phan lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) tinh - canh trinh toan duong ((huong dan) or (cong san)) phan lap".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) tinh - canh trinh toan duong ((huong dan) or (cong san)) phan lap*.