Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
trinh xay » trinh ky
dung cong » dung trong
ho chieu » hoc thieu, doi chieu, mot chieu
tran xay » tra xay, tran day, tran xuan
cong san » cong tac
san hang » san chang, ban hang, van hang
hang tap » hang tai, han tap, hang tmcp

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)) sach - thanh ((tran xay) OR (trinh xay)) dung cong san hang tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) sach - thanh ((tran xay) OR (trinh xay)) dung cong san hang tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (ho chieu)) sach - thanh ((tran xay) OR (trinh xay)) dung cong san hang tap".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (ho chieu)) sach - thanh ((tran xay) OR (trinh xay)) dung cong san hang tap*.