Perhaps you should try some spelling variations:
thuat nhung » thuat hung, thuat chung, thuat chuong
theo chieu » theo tieu, ho chieu, thi chieu
thanh tinh » thanh binh, nhanh tinh, than kinh
tinh thuat » tinh thua, tinh chat, tinh thai
nhung cong » dung cong, thong cong, hang cong
theo chu » cho chu, chao chu, theo yeu
van toan » van tuan, van thanh, manh toan
van tan » van tuan, van ban, van tai

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 chu)) sach - thanh tinh thuat nhung cong ((van toan) OR (van tan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((theo chieu) OR (theo chu)) sach - thanh tinh thuat nhung cong ((van toan) OR (van tan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((theo chieu) or (theo chu)) sach - thanh tinh thuat nhung cong ((van toan) OR (van tan)) tap".
• Adding a wildcard symbol may retrieve word variants: ((theo chieu) or (theo chu)) sach - thanh tinh thuat nhung cong ((van toan) OR (van tan)) tap*.