Perhaps you should try some spelling variations:
thuat nhung » thuat hung, thuat chung, thuat chuong
thanh trung » thanh tung
theo chieu » theo tieu, ho chieu, theo chu
chieu sach » chinh sach, chiet tach, chieu sang
tuan nhung » quan nhung, tuan hung, tranh nhung
cong ban » cong bang, cong san, cong tan
toan cao » toan tap
toan ban » van ban

You may be able to get more results by adjusting your search query.

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