Perhaps you should try some spelling variations:
chieu sach » chieu sang, chieu xanh, hieu cach
hanh trung » thanh trung, hanh trang, manh trung
trung tan » trung tuan, trung tran, trung tang
trong anh » truong anh, trong nganh, trong doanh
tan dung » tran dung, tin dung, van dung
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 tan dung trong 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 tan dung trong anh tuan cau.
• Adding a wildcard symbol may retrieve word variants: hoc ((((chieu sach) or (chiet tach))) or (chinh sach)) - hanh trung tan dung trong anh tuan cau*.