Perhaps you should try some spelling variations:
chieu sach » chieu sang, chieu xanh, hieu cach
hanh trung » thanh trung, hanh trang, manh trung
trung tuan » trung thanh, trung tam, tran tuan
tuan dung » tuan duong, tran dung, tan dung
dung cong » dung trong
cong anh » cong danh, dong anh, hong anh
tuan cau » toan cau, quan cau, tuan cu

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 (chiet tach))) or (chinh sach)) - hanh trung tuan dung cong anh tuan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((((chieu sach) OR (chiet tach))) OR (chinh sach)) - hanh trung tuan dung cong anh tuan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((((chieu sach) OR (chiet tach))) or (chinh sach)) - hanh trung tuan dung cong anh tuan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu sach) OR (chiet tach))) or (chinh sach)) - hanh trung tuan dung cong anh tuan cau*.