Perhaps you should try some spelling variations:
theo chieu » theo tieu, theo chu, thi chieu
thanh tung » thanh cong
dang trong » dung trong, dong trong, dang trung
lang trong » dung trong, cong trong, dong trong
van nhanh » van thanh, van hanh, van khanh
nhanh cay » nhanh ha, nhanh bac, nhanh va
ho chieu » hoc thieu, doi chieu, mot chieu
tung cua » trung cua, tuong cua, dung cua

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 tung cua ((dang trong) or (lang trong)) van nhanh cay~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (ho chieu)) sach - thanh tung cua ((dang trong) OR (lang trong)) van nhanh cay.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) OR (ho chieu)) sach - thanh tung cua ((dang trong) or (lang trong)) van nhanh cay".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) OR (ho chieu)) sach - thanh tung cua ((dang trong) or (lang trong)) van nhanh cay*.