Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
hoc chinh » hoan chinh, hoc kinh
trung cua » truong cua, trung cap, dung cua
tong hong » tong thong, thong hong, tong cong
hong hanh » dong thanh, cong thanh, hong ha
hanh tuan » thanh tuan, anh tuan, manh tuan
tuan cu » tuan tu, quan cua, tuan thu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc chinh) or (hoc sinh)) sach - hanh ((trung cua) OR (trung tuan)) tong hong hanh tuan cu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc chinh) OR (hoc sinh)) sach - hanh ((trung cua) OR (trung tuan)) tong hong hanh tuan cu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((hoc chinh) or (hoc sinh)) sach - hanh ((trung cua) OR (trung tuan)) tong hong hanh tuan cu".
• Adding a wildcard symbol may retrieve word variants: ((hoc chinh) or (hoc sinh)) sach - hanh ((trung cua) OR (trung tuan)) tong hong hanh tuan cu*.