Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu sang
trung tuan » trung thanh, trung tam, tran tuan
hieu manh » chieu xanh, hieu nganh, dieu hanh
trung cua » truong cua, trung cap, dung cua
dong van » duong van, dang van, dong von
van toan » van tuan, van tan, van thanh
toan cau » toan cao, toan ban, toan tap

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

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