Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
bien canh » bien tinh, bien dang
trung cua » truong cua, trung cap, dung cua
cong tan » cong tac, cong san, cong thanh
tan thai » tay thai, ban thai, tan tai
thai cao » tai cao, thoai cac, thuat cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((bien canh) or (chieu sach)) - manh ((trung cua) OR (trung tuan)) nhung cong tan thai cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((bien canh) OR (chieu sach)) - manh ((trung cua) OR (trung tuan)) nhung cong tan thai cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((bien canh) or (chieu sach)) - manh ((trung cua) OR (trung tuan)) nhung cong tan thai cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((bien canh) or (chieu sach)) - manh ((trung cua) OR (trung tuan)) nhung cong tan thai cao*.