Perhaps you should try some spelling variations:
truong dong » trong dong, truong dang, tuong dong
thanh thang » nhanh thang, thanh thanh, thanh hang
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
va truong » van truong, xa truong, va thuong
thang va » hang va, trang va, thong va
dong tac » cong tac, dong tai, dong bac
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan 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 sach - thanh thang va truong dong tac ((than cau) or (toan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu sach - thanh thang va truong dong tac ((than cau) OR (toan cau)).
• Adding a wildcard symbol may retrieve word variants: theo chieu sach - thanh thang va truong dong tac ((than cau) or (toan cau))*.