Perhaps you should try some spelling variations:
phuong manh » phuong anh, phuong danh, phuong hanh
chieu sach » chiet tach, chieu sang, chieu xanh
hanh trung » thanh trung, hanh trang, manh trung
phung manh » hung manh, nhung manh, phung minh
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
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 (chinh sach)) - hanh trung cua nhung ((phuong manh) OR (phung manh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu sach) OR (chinh sach)) - hanh trung cua nhung ((phuong manh) OR (phung manh)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu sach) or (chinh sach)) - hanh trung cua nhung ((phuong manh) OR (phung manh)) toan cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu sach) or (chinh sach)) - hanh trung cua nhung ((phuong manh) OR (phung manh)) toan cau*.