Perhaps you should try some spelling variations:
theo chieu » ho chieu, theo chu, thi chieu
trinh vat » trinh van, trinh luat, sinh vat
hang cong » dang cong, hang nong, bang cong
cong toan » cong tan, cong hoan, cong tuan
toan phan » thanh phan, toan ban, hoa phan
trinh va » trinh van, trinh ve, trinh vi
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: ((theo chieu) or (theo tieu)) sach - canh ((trinh va) OR (trinh vat)) hang cong toan phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo tieu)) sach - canh ((trinh va) OR (trinh vat)) hang cong toan phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo tieu)) sach - canh ((trinh va) OR (trinh vat)) hang cong toan phan cau".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo tieu)) sach - canh ((trinh va) OR (trinh vat)) hang cong toan phan cau*.