Perhaps you should try some spelling variations:
phuong manh » phuong anh, phung manh, phuong danh
chieu sach » chiet tach, chieu sang, chieu xanh
hanh trung » thanh trung, hanh trang, manh trung
manh toan » thanh toan, anh tuan, tinh toan
tuan chu » tuan thu, quan chu, tuan cu
toan cau » toan cao, toan ban, toan tap
tan chu » can chu, tan phu, van chu

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

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