Perhaps you should try some spelling variations:
phuong manh » phuong anh, phuong danh, phuong hanh
chiet tach » chieu sach
phung manh » hung manh, nhung manh, phung minh
hoc chiet » hoc thiet, hoc nhiet, hoc hien
manh tang » manh thang, manh tung, anh tang
tang ap » tang van, tang tai, tang dan
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 - manh tang ap dung ((phuong manh) OR (phung manh)) van ban~".
• Adding a wildcard symbol may retrieve word variants: hoc chiet tach - manh tang ap dung ((phuong manh) OR (phung manh)) van ban*.