Perhaps you should try some spelling variations:
phuong manh » phuong anh, phung manh, phuong danh
dung phuong » dung thuong, bang phuong, dung chung
chieu sach » chinh sach, chieu sang, chieu xanh
manh tung » manh hung, thanh tung
manh toan » thanh toan, anh tuan, tinh toan
toan ban » van ban
tung ap » tang ap, tung dan, tung bay
ap dung » xay dung, van dung

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chiet tach) OR (chieu sach)) - manh tung ap dung phuong manh toan ban~".
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) OR (chieu sach)) - manh tung ap dung phuong manh toan ban*.