Perhaps you should try some spelling variations:
phuong thao » phuong phap, phuong thuc
dung phuong » dung thuong, bang phuong, dung chung
hanh trang » thanh trung, canh tranh, hanh trinh
chieu xanh » chieu sach, chieu sang, chieu tinh
hanh tang » anh tang, hanh mang, hanh tung
ho chieu » theo chieu, hoc thieu, doi chieu
toan cau » toan cao, toan tap, toan tai
toan ban » van ban
va dung » van dung, va duong, vat dung

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ho chieu xanh - ((hanh tang) OR (hanh trang)) va dung phuong thao ((toan cau) OR (toan ban))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chieu xanh - ((hanh tang) or (hanh trang)) va dung phuong thao ((toan cau) OR (toan ban))~".
• Adding a wildcard symbol may retrieve word variants: ho chieu xanh - ((hanh tang) or (hanh trang)) va dung phuong thao ((toan cau) OR (toan ban))*.