Perhaps you should try some spelling variations:
phuong dung » thong dung, cuong dung, phuong hoang
hanh trinh » canh tranh, hanh chinh
canh trinh » canh tranh, canh tinh, anh trinh
hieu lang » chieu sang, hieu quang, nhieu tang
va phuong » va thuong, cac phuong
dung manh » duong manh, dung danh, hung manh
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
ho hieu » ho chieu, hoi hieu, nho hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - ((canh trinh) or (hanh trinh)) va phuong dung manh ((toan cau) OR (toan tap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - ((canh trinh) OR (hanh trinh)) va phuong dung manh ((toan cau) OR (toan tap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - ((canh trinh) or (hanh trinh)) va phuong dung manh ((toan cau) OR (toan tap))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - ((canh trinh) or (hanh trinh)) va phuong dung manh ((toan cau) OR (toan tap))*.